diff --git a/IPython/html/static/notebook/js/cell.js b/IPython/html/static/notebook/js/cell.js
index 4a87ba6d8..502df103f 100644
--- a/IPython/html/static/notebook/js/cell.js
+++ b/IPython/html/static/notebook/js/cell.js
@@ -33,9 +33,9 @@ var IPython = (function (IPython) {
      */
     var Cell = function (options) {
 
-        options = this.mergeopt(Cell, options)
+        options = this.mergeopt(Cell, options);
         // superclass default overwrite our default
-
+        
         this.placeholder = options.placeholder || '';
         this.read_only = options.cm_config.readOnly;
         this.selected = false;
@@ -52,7 +52,7 @@ var IPython = (function (IPython) {
         // same order. Easiest is to create and set to null in parent class.
 
         this.element = null;
-        this.cell_type = null;
+        this.cell_type = this.cell_type || null;
         this.code_mirror = null;
 
 
@@ -80,6 +80,7 @@ var IPython = (function (IPython) {
     }
 
     Cell.prototype.mergeopt = function(_class, options, overwrite){
+        options = options || {};
         overwrite = overwrite || {};
         return $.extend(true, {}, _class.options_default, options, overwrite)
 
@@ -200,6 +201,7 @@ var IPython = (function (IPython) {
     Cell.prototype.toJSON = function () {
         var data = {};
         data.metadata = this.metadata;
+        data.cell_type = this.cell_type;
         return data;
     };
 
diff --git a/IPython/html/static/notebook/js/celltoolbar.js b/IPython/html/static/notebook/js/celltoolbar.js
index 74186b1d4..e32021219 100644
--- a/IPython/html/static/notebook/js/celltoolbar.js
+++ b/IPython/html/static/notebook/js/celltoolbar.js
@@ -37,37 +37,39 @@ var IPython = (function (IPython) {
         this.inner_element = $('<div/>').addClass('celltoolbar')
         this.element = $('<div/>').addClass('ctb_hideshow')
             .append(this.inner_element);
+        this.show();
     };
 
 
     // The default css style for the outer celltoolbar div
-    // (ctb_hideshow) is display: none. We add the ctb_show
-    // class to either 1) the body to show all cell's toolbars
-    // or 2) to the individual celltoolbar divs to show just one
-    // cell's toolbar.
+    // (ctb_hideshow) is display: none.
+    // To show the cell toolbar, *both* of the following conditions must be met:
+    // - A parent container has class `ctb_global_show`
+    // - The celltoolbar has the class `ctb_show`
+    // This allows global show/hide, as well as per-cell show/hide.
 
     CellToolbar.global_hide = function () {
-        $('body').removeClass('ctb_show');
-    }
+        $('body').removeClass('ctb_global_show');
+    };
 
 
     CellToolbar.global_show = function () {
-       $('body').addClass('ctb_show');
-    }
+        $('body').addClass('ctb_global_show');
+    };
 
 
     CellToolbar.prototype.hide = function () {
         this.element.removeClass('ctb_show');
-    }
+    };
 
 
     CellToolbar.prototype.show = function () {
         this.element.addClass('ctb_show');
-    }
+    };
 
 
     /**
-     * Class variable that should contain a dict of all availlable callback
+     * Class variable that should contain a dict of all available callback
      * we need to think of wether or not we allow nested namespace
      * @property _callback_dict
      * @private
@@ -89,7 +91,7 @@ var IPython = (function (IPython) {
 
 
     /**
-     * Class variable that should contains the CellToolbar instances for each
+     * Class variable that should contain the CellToolbar instances for each
      * cell of the notebook
      *
      * @private
@@ -97,17 +99,17 @@ var IPython = (function (IPython) {
      * @static
      * @type List
      */
-    CellToolbar._instances =[]
+    CellToolbar._instances = [];
 
 
     /**
-     * keep a list of all the availlabel presets for the toolbar
+     * keep a list of all the available presets for the toolbar
      * @private
      * @property _presets
      * @static
      * @type Dict
      */
-    CellToolbar._presets ={}
+    CellToolbar._presets = {};
 
 
     // this is by design not a prototype.
@@ -180,7 +182,7 @@ var IPython = (function (IPython) {
      *      CellToolbar.register_preset('foo.foo_preset2', ['foo.c4', 'foo.c5'])
      */
     CellToolbar.register_preset = function(name, preset_list) {
-        CellToolbar._presets[name] = preset_list
+        CellToolbar._presets[name] = preset_list;
         $([IPython.events]).trigger('preset_added.CellToolbar', {name: name});
     };
 
@@ -217,11 +219,11 @@ var IPython = (function (IPython) {
     CellToolbar.activate_preset = function(preset_name){
         var preset = CellToolbar._presets[preset_name];
 
-        if(preset != undefined){
+        if(preset !== undefined){
             CellToolbar._ui_controls_list = preset;
             CellToolbar.rebuild_all();
         }
-    }
+    };
 
 
     /**
@@ -235,29 +237,37 @@ var IPython = (function (IPython) {
         for(var i in CellToolbar._instances){
             CellToolbar._instances[i].rebuild();
         }
-    }
+    };
 
     /**
-     * Rebuild all the button on the toolbar to update it's state.
+     * Rebuild all the button on the toolbar to update its state.
      * @method rebuild
      */
     CellToolbar.prototype.rebuild = function(){
         // strip evrything from the div
-        // which is probabli metainner.
+        // which is probably inner_element
         // or this.element.
         this.inner_element.empty();
 
-        var cdict = CellToolbar._callback_dict;
+        var callbacks = CellToolbar._callback_dict;
         var preset = CellToolbar._ui_controls_list;
-        // Yes we iterate on the class varaible, not the instance one.
-        for ( var index in CellToolbar._ui_controls_list){
+        // Yes we iterate on the class variable, not the instance one.
+        for (var index in preset) {
+            var key = preset[index];
+            var callback = callbacks[key];
+            if (!callback) continue;
+            
             var local_div = $('<div/>').addClass('button_container');
-            // Note,
-            // do this the other way, wrap in try/catch and don't append if any errors.
-            this.inner_element.append(local_div)
-            cdict[preset[index]](local_div, this.cell)
+            try {
+                callback(local_div, this.cell, this);
+            } catch (e) {
+                console.log("Error in cell toolbar callback " + key, e);
+                continue;
+            }
+            // only append if callback succeeded.
+            this.inner_element.append(local_div);
         }
-    }
+    };
 
 
     /**
@@ -303,8 +313,8 @@ var IPython = (function (IPython) {
      *
      */
     CellToolbar.utils.checkbox_ui_generator = function(name, setter, getter){
-         return function(div, cell) {
-            var button_container = $(div)
+        return function(div, cell, celltoolbar) {
+            var button_container = $(div);
 
             var chkb = $('<input/>').attr('type', 'checkbox');
             var lbl = $('<label/>').append($('<span/>').text(name));
@@ -315,11 +325,10 @@ var IPython = (function (IPython) {
                         var v = getter(cell);
                         setter(cell, !v);
                         chkb.attr("checked", !v);
-                    })
-           button_container.append($('<div/>').append(lbl));
-
-        }
-    }
+            });
+            button_container.append($('<div/>').append(lbl));
+        };
+    };
 
 
     /**
@@ -365,16 +374,16 @@ var IPython = (function (IPython) {
      *      CellToolbar.register_callback('slideshow.select', select_type);
      *
      */
-    CellToolbar.utils.select_ui_generator = function(list_list, setter, getter, label){
-        label= label? label: "";
-        return function(div, cell) {
-            var button_container = $(div)
+    CellToolbar.utils.select_ui_generator = function(list_list, setter, getter, label, cell_types){
+        label = label || "";
+        return function(div, cell, celltoolbar) {
+            var button_container = $(div);
             var lbl = $("<label/>").append($('<span/>').text(label));
             var select = $('<select/>').addClass('ui-widget ui-widget-content');
             for(var itemn in list_list){
-                var opt = $('<option/>');
-                        opt.attr('value', list_list[itemn][1])
-                        opt.text(list_list[itemn][0])
+                var opt = $('<option/>')
+                    .attr('value', list_list[itemn][1])
+                    .text(list_list[itemn][0]);
                 select.append(opt);
             }
             select.val(getter(cell));
@@ -382,8 +391,13 @@ var IPython = (function (IPython) {
                         setter(cell, select.val());
                     });
             button_container.append($('<div/>').append(lbl).append(select));
+            if (cell_types && cell_types.indexOf(cell.cell_type) == -1) {
+                celltoolbar.hide();
+            } else {
+                celltoolbar.show();
+            }
 
-        }
+        };
     };
 
 
diff --git a/IPython/html/static/notebook/js/celltoolbarpresets/default.js b/IPython/html/static/notebook/js/celltoolbarpresets/default.js
index fb1ae464b..74210ca7c 100644
--- a/IPython/html/static/notebook/js/celltoolbarpresets/default.js
+++ b/IPython/html/static/notebook/js/celltoolbarpresets/default.js
@@ -28,7 +28,7 @@
         var button_container = div;
         var button = $('<button/>')
             .addClass("btn btn-mini")
-            .text("Raw Edit")
+            .text("Edit Metadata")
             .click( function () {
                 raw_edit(cell);
                 return false;
@@ -40,7 +40,7 @@
     var example_preset = [];
     example_preset.push('default.rawedit');
 
-    CellToolbar.register_preset('Default', example_preset);
-    console.log('Default extension for metadata editing loaded.');
+    CellToolbar.register_preset('Edit Metadata', example_preset);
+    console.log('Default extension for cell metadata editing loaded.');
 
 }(IPython));
diff --git a/IPython/html/static/notebook/js/celltoolbarpresets/rawcell.js b/IPython/html/static/notebook/js/celltoolbarpresets/rawcell.js
new file mode 100644
index 000000000..3d5179801
--- /dev/null
+++ b/IPython/html/static/notebook/js/celltoolbarpresets/rawcell.js
@@ -0,0 +1,90 @@
+//----------------------------------------------------------------------------
+//  Copyright (C) 2012  The IPython Development Team
+//
+//  Distributed under the terms of the BSD License.  The full license is in
+//  the file COPYING, distributed as part of this software.
+//----------------------------------------------------------------------------
+
+//============================================================================
+// CellToolbar Example
+//============================================================================
+
+(function(IPython) {
+  "use strict";
+
+  var CellToolbar = IPython.CellToolbar;
+  var raw_cell_preset = [];
+  var utils = IPython.utils;
+
+  var select_type = CellToolbar.utils.select_ui_generator([
+    ["None", "-"],
+    ["LaTeX", "text/latex"],
+    ["reST", "text/restructuredtext"],
+    ["HTML", "text/html"],
+    ["Markdown", "text/markdown"],
+    ["Python", "application/x-python"],
+    ["Custom", "dialog"],
+
+    ],
+      // setter
+      function(cell, value) {
+        if (value === "-") {
+          delete cell.metadata.raw_mimetype;
+        } else if (value === 'dialog'){
+            var dialog = $('<div/>').append(
+                $("<p/>")
+                    .html("Set the MIME type of the raw cell:")
+            ).append(
+                $("<br/>")
+            ).append(
+                $('<input/>').attr('type','text').attr('size','25')
+                .val(cell.metadata.raw_mimetype || "-")
+            );
+            IPython.dialog.modal({
+                title: "Raw Cell MIME Type",
+                body: dialog,
+                buttons : {
+                    "Cancel": {},
+                    "OK": {
+                        class: "btn-primary",
+                        click: function () {
+                            console.log(cell);
+                            cell.metadata.raw_mimetype = $(this).find('input').val();
+                            console.log(cell.metadata);
+                        }
+                    }
+                },
+                open : function (event, ui) {
+                    var that = $(this);
+                    // Upon ENTER, click the OK button.
+                    that.find('input[type="text"]').keydown(function (event, ui) {
+                        if (event.which === utils.keycodes.ENTER) {
+                            that.find('.btn-primary').first().click();
+                            return false;
+                        }
+                    });
+                    that.find('input[type="text"]').focus().select();
+                }
+            });
+        } else {
+          cell.metadata.raw_mimetype = value;
+        }
+      },
+      //getter
+      function(cell) {
+        return cell.metadata.raw_mimetype || "";
+      },
+      // name
+      "Raw NBConvert Format",
+      // cell_types
+      ["raw"]
+  );
+
+  CellToolbar.register_callback('raw_cell.select', select_type);
+
+  raw_cell_preset.push('raw_cell.select');
+
+  CellToolbar.register_preset('Raw Cell Format', raw_cell_preset);
+  console.log('Raw Cell Format toolbar preset loaded.');
+
+}(IPython));
\ No newline at end of file
diff --git a/IPython/html/static/notebook/js/codecell.js b/IPython/html/static/notebook/js/codecell.js
index 63a4e69cf..132b3ab24 100644
--- a/IPython/html/static/notebook/js/codecell.js
+++ b/IPython/html/static/notebook/js/codecell.js
@@ -445,7 +445,6 @@ var IPython = (function (IPython) {
     CodeCell.prototype.toJSON = function () {
         var data = IPython.Cell.prototype.toJSON.apply(this);
         data.input = this.get_text();
-        data.cell_type = 'code';
         // is finite protect against undefined and '*' value
         if (isFinite(this.input_prompt_number)) {
             data.prompt_number = this.input_prompt_number;
diff --git a/IPython/html/static/notebook/js/maintoolbar.js b/IPython/html/static/notebook/js/maintoolbar.js
index 1586055f7..58e51f76f 100644
--- a/IPython/html/static/notebook/js/maintoolbar.js
+++ b/IPython/html/static/notebook/js/maintoolbar.js
@@ -119,7 +119,7 @@ var IPython = (function (IPython) {
                 // .addClass('ui-widget-content')
                 .append($('<option/>').attr('value','code').text('Code'))
                 .append($('<option/>').attr('value','markdown').text('Markdown'))
-                .append($('<option/>').attr('value','raw').text('Raw Text'))
+                .append($('<option/>').attr('value','raw').text('Raw NBConvert'))
                 .append($('<option/>').attr('value','heading1').text('Heading 1'))
                 .append($('<option/>').attr('value','heading2').text('Heading 2'))
                 .append($('<option/>').attr('value','heading3').text('Heading 3'))
diff --git a/IPython/html/static/notebook/js/textcell.js b/IPython/html/static/notebook/js/textcell.js
index d3e74ffc6..cf7f003d0 100644
--- a/IPython/html/static/notebook/js/textcell.js
+++ b/IPython/html/static/notebook/js/textcell.js
@@ -46,11 +46,11 @@ var IPython = (function (IPython) {
 
         options = this.mergeopt(TextCell,options,{cm_config:cm_overwrite_options});
 
-        IPython.Cell.apply(this, [options]);
+        this.cell_type = this.cell_type || 'text';
 
+        IPython.Cell.apply(this, [options]);
 
         this.rendered = false;
-        this.cell_type = this.cell_type || 'text';
     };
 
     TextCell.prototype = new IPython.Cell();
@@ -279,8 +279,10 @@ var IPython = (function (IPython) {
      */
     TextCell.prototype.toJSON = function () {
         var data = IPython.Cell.prototype.toJSON.apply(this);
-        data.cell_type = this.cell_type;
         data.source = this.get_text();
+        if (data.source == this.placeholder) {
+            data.source = "";
+        }
         return data;
     };
 
@@ -291,12 +293,10 @@ var IPython = (function (IPython) {
      * @extends IPython.HTMLCell
      */
     var MarkdownCell = function (options) {
-        var options = options || {};
-
-        options = this.mergeopt(MarkdownCell,options);
-        TextCell.apply(this, [options]);
+        options = this.mergeopt(MarkdownCell, options);
 
         this.cell_type = 'markdown';
+        TextCell.apply(this, [options]);
     };
 
     MarkdownCell.options_default = {
@@ -337,7 +337,7 @@ var IPython = (function (IPython) {
             }
             this.element.find('div.text_cell_input').hide();
             this.element.find("div.text_cell_render").show();
-            this.typeset()
+            this.typeset();
             this.rendered = true;
         }
     };
@@ -351,20 +351,21 @@ var IPython = (function (IPython) {
      * @extends IPython.TextCell
      */
     var RawCell = function (options) {
-
-        options = this.mergeopt(RawCell,options)
-        TextCell.apply(this, [options]);
-
+        options = this.mergeopt(RawCell, options);
+        
         this.cell_type = 'raw';
+        TextCell.apply(this, [options]);
 
-        var that = this
+        var that = this;
         this.element.focusout(
                 function() { that.auto_highlight(); }
-            );
+        );
     };
 
     RawCell.options_default = {
-        placeholder : "Type plain text and LaTeX: $\\alpha^2$"
+        placeholder : "Write raw LaTeX or other formats here, for use with nbconvert.\n" +
+            "It will not be rendered in the notebook.\n" + 
+            "When passing through nbconvert, a Raw Cell's content is added to the output unmodified."
     };
 
 
@@ -382,7 +383,10 @@ var IPython = (function (IPython) {
     /** @method render **/
     RawCell.prototype.render = function () {
         this.rendered = true;
-        this.edit();
+        var text = this.get_text();
+        if (text === "") { text = this.placeholder; }
+        console.log('rendering', text);
+        this.set_text(text);
     };
 
 
@@ -415,8 +419,7 @@ var IPython = (function (IPython) {
     /** @method select **/
     RawCell.prototype.select = function () {
         IPython.Cell.prototype.select.apply(this);
-        this.code_mirror.refresh();
-        this.code_mirror.focus();
+        this.edit();
     };
 
     /** @method at_top **/
@@ -451,16 +454,16 @@ var IPython = (function (IPython) {
      * @extends IPython.TextCell
      */
     var HeadingCell = function (options) {
+        options = this.mergeopt(HeadingCell, options);
 
-        options = this.mergeopt(HeadingCell,options)
+        this.level = 1;
+        this.cell_type = 'heading';
         TextCell.apply(this, [options]);
 
         /**
          * heading level of the cell, use getter and setter to access
          * @property level
          */
-        this.level = 1;
-        this.cell_type = 'heading';
     };
 
     HeadingCell.options_default = {
diff --git a/IPython/html/static/notebook/less/celltoolbar.less b/IPython/html/static/notebook/less/celltoolbar.less
index 4c1ef6b2a..057b40be3 100644
--- a/IPython/html/static/notebook/less/celltoolbar.less
+++ b/IPython/html/static/notebook/less/celltoolbar.less
@@ -1,12 +1,10 @@
-/* Css for the metadata edit area */
-
+/* CSS for the cell toolbar */
 
 .celltoolbar {
     border: thin solid #CFCFCF;
     border-bottom: none;
     background : #EEE;
-    border-top-right-radius: 3px;
-    border-top-left-radius: 3px;
+    border-radius : 3px 3px 0px 0px;
     width:100%;
     -webkit-box-pack: end;
     height:22px;
@@ -14,20 +12,6 @@
     .reverse();
 }
 
-
-.no_input_radius {
-    border-top-right-radius: 0px;
-    border-top-left-radius: 0px;
-}
-
-.text_cell .ctb_prompt {
-    display: none;
-}
-
-.code_cell .ctb_prompt {
-    display: block;
-}
-
 .ctb_hideshow {
     display:none;
     vertical-align:bottom;
@@ -38,41 +22,21 @@
    padding-top: 0px;
 }
 
-.ctb_area {
-    margin:0;
-    padding:0;
-    width:100%;
 
-}
-
-
-/*ctb_show is added to either body or the ctb_hideshow div to show
-all or one cell's toolbars.
+/* ctb_show is added to the ctb_hideshow div to show the cell toolbar.
+   Cell toolbars are only shown when the ctb_global_show class is also set.
 */
-.ctb_show.ctb_hideshow, .ctb_show .ctb_hideshow {
-    display:block;
+.ctb_global_show .ctb_show.ctb_hideshow {
+    display: block;
 }
 
-.ctb_show .input_area,
-.ctb_show .ctb_hideshow + div.text_cell_input {
+.ctb_global_show .ctb_show + .input_area,
+.ctb_global_show .ctb_show + div.text_cell_input
+{
     border-top-right-radius: 0px;
     border-top-left-radius: 0px;
 }
 
-.ctb_show > .celltoolbar {
-    border-bottom-right-radius: 0px;
-    border-bottom-left-radius: 0px;
-}
-
-.button_container {
-    margin-top:0;
-    margin-bottom:0;
-}
-
-
-.ui-button {
-    min-width:30px;
-}
 .celltoolbar .button_container select {
     margin: 10px;
     margin-top: 1px;
@@ -108,4 +72,5 @@ all or one cell's toolbars.
     border: none;
     vertical-align:top;
     height:20px;
+    min-width:30px;
 }
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index ac1857a73..52b6368f9 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -1537,23 +1537,16 @@ pre,code,kbd,samp{white-space:pre-wrap;}
 #fonttest{font-family:monospace;}
 p{margin-bottom:0;}
 .end_space{height:200px;}
-.celltoolbar{border:thin solid #CFCFCF;border-bottom:none;background:#EEE;border-top-right-radius:3px;border-top-left-radius:3px;width:100%;-webkit-box-pack:end;height:22px;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;-webkit-box-direction:reverse;-moz-box-direction:reverse;box-direction:reverse;}
-.no_input_radius{border-top-right-radius:0px;border-top-left-radius:0px;}
-.text_cell .ctb_prompt{display:none;}
-.code_cell .ctb_prompt{display:block;}
+.celltoolbar{border:thin solid #CFCFCF;border-bottom:none;background:#EEE;border-radius:3px 3px 0px 0px;width:100%;-webkit-box-pack:end;height:22px;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;-webkit-box-direction:reverse;-moz-box-direction:reverse;box-direction:reverse;}
 .ctb_hideshow{display:none;vertical-align:bottom;padding-right:2px;}
 .celltoolbar>div{padding-top:0px;}
-.ctb_area{margin:0;padding:0;width:100%;}
-.ctb_show.ctb_hideshow,.ctb_show .ctb_hideshow{display:block;}
-.ctb_show .input_area,.ctb_show .ctb_hideshow+div.text_cell_input{border-top-right-radius:0px;border-top-left-radius:0px;}
-.ctb_show>.celltoolbar{border-bottom-right-radius:0px;border-bottom-left-radius:0px;}
-.button_container{margin-top:0;margin-bottom:0;}
-.ui-button{min-width:30px;}
+.ctb_global_show .ctb_show.ctb_hideshow{display:block;}
+.ctb_global_show .ctb_show+.input_area,.ctb_global_show .ctb_show+div.text_cell_input{border-top-right-radius:0px;border-top-left-radius:0px;}
 .celltoolbar .button_container select{margin:10px;margin-top:1px;margin-bottom:0px;padding:0;font-size:87%;width:auto;display:inline-block;height:18px;line-height:18px;vertical-align:top;}
 .celltoolbar label{display:inline-block;height:15px;line-height:15px;vertical-align:top;}
 .celltoolbar label span{font-size:85%;}
 .celltoolbar input[type=checkbox]{margin:0px;margin-left:4px;margin-right:4px;}
-.celltoolbar .ui-button{border:none;vertical-align:top;height:20px;}
+.celltoolbar .ui-button{border:none;vertical-align:top;height:20px;min-width:30px;}
 .completions{position:absolute;z-index:10;overflow:hidden;border:1px solid #ababab;border-radius:4px;-webkit-box-shadow:0px 6px 10px -1px #adadad;-moz-box-shadow:0px 6px 10px -1px #adadad;box-shadow:0px 6px 10px -1px #adadad;}
 .completions select{background:white;outline:none;border:none;padding:0px;margin:0px;overflow:auto;font-family:monospace;font-size:110%;color:#000000;}
 .completions select option.context{color:#0064cd;}
diff --git a/IPython/html/templates/notebook.html b/IPython/html/templates/notebook.html
index 06c699b69..ae73841a8 100644
--- a/IPython/html/templates/notebook.html
+++ b/IPython/html/templates/notebook.html
@@ -157,8 +157,8 @@ class="notebook_app"
                           title="Contents will be rendered as HTML and serve as explanatory text">
                           <a href="#">Markdown</a></li>
                       <li id="to_raw"
-                          title="Contents will display unmodified in a fixed-width font">
-                          <a href="#">Raw Text</a></li>
+                          title="Contents will pass through nbconvert unmodified">
+                          <a href="#">Raw NBConvert</a></li>
                       <li id="to_heading1"><a href="#">Heading 1</a></li>
                       <li id="to_heading2"><a href="#">Heading 2</a></li>
                       <li id="to_heading3"><a href="#">Heading 3</a></li>
@@ -297,6 +297,7 @@ class="notebook_app"
 <script src="{{ static_url("notebook/js/contexthint.js") }}" charset="utf-8"></script>
 
 <script src="{{ static_url("notebook/js/celltoolbarpresets/default.js") }}" type="text/javascript" charset="utf-8"></script>
+<script src="{{ static_url("notebook/js/celltoolbarpresets/rawcell.js") }}" type="text/javascript" charset="utf-8"></script>
 <script src="{{ static_url("notebook/js/celltoolbarpresets/slideshow.js") }}" type="text/javascript" charset="utf-8"></script>
 
 {% endblock %}
diff --git a/IPython/nbconvert/exporters/python.py b/IPython/nbconvert/exporters/python.py
index a3b475155..1d13bc3e7 100644
--- a/IPython/nbconvert/exporters/python.py
+++ b/IPython/nbconvert/exporters/python.py
@@ -1,6 +1,5 @@
-"""
-Python exporter which exports Notebook code into a PY file.
-"""
+"""Python script Exporter class"""
+
 #-----------------------------------------------------------------------------
 # Copyright (c) 2013, the IPython Development Team.
 #
@@ -29,3 +28,7 @@ class PythonExporter(TemplateExporter):
     file_extension = Unicode(
         'py', config=True, 
         help="Extension of the file that should be written to disk")
+
+    def _raw_mimetype_default(self):
+        return 'application/x-python'
+