Markdown cells are now saved and restored in notebooks.

IPython/frontend/html/notebook/static/js/notebook.js

@@ -624,6 +624,9 @@ var IPython = (function (IPython) {
                 } else if (cell_data.cell_type === 'html') {
                     new_cell = this.insert_html_cell_after();
                     new_cell.fromJSON(cell_data);
+                } else if (cell_data.cell_type === 'markdown') {
+                    new_cell = this.insert_markdown_cell_after();
+                    new_cell.fromJSON(cell_data);
                 };
             };          
         };

IPython/frontend/html/notebook/static/js/textcell.js

@@ -132,7 +132,7 @@ var IPython = (function (IPython) {
         if (data.cell_type === this.cell_type) {
             if (data.source !== undefined) {
                 this.set_source(data.source);
-                this.set_rendered(data.source);
+                this.set_rendered(data.rendered);
             };
         };
     }