diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index af337a4e7..000000000
--- a/.gitignore
+++ /dev/null
@@ -1,23 +0,0 @@
-*.swp
-/.project
-/.idea
-/.bundle
-*.swp
-/config/database.yml
-/config/configuration.yml
-/files/*
-/log/*
-/public/tmp/*
-/tmp/*
-/public/cache/*
-.gitignore
-/config/newrelic.yml
-/public/images/avatars/*
-/Gemfile
-/Gemfile.lock
-/db/schema.rb
-/Gemfile.lock
-/lib/plugins/acts_as_versioned/test/debug.log
-.rbenv-gemsets
-.DS_Store
-public/api_doc/
diff --git a/app/controllers/issues_controller.rb b/app/controllers/issues_controller.rb
index 3ddf4ff6f..6a251a80c 100644
--- a/app/controllers/issues_controller.rb
+++ b/app/controllers/issues_controller.rb
@@ -156,7 +156,7 @@ class IssuesController < ApplicationController
     call_hook(:controller_issues_new_before_save, { :params => params, :issue => @issue })
     @issue.save_attachments(params[:attachments] || (params[:issue] && params[:issue][:uploads]))
     # 给该issue在它所在的项目中所有的issues中所在的位置给一个序号
-    @issue.project_issues_index = @issue.project.issues.last.project_issues_index + 1
+    @issue.project_issues_index = @issue.project.issues.last.nil? ? 1 : @issue.project.issues.last.project_issues_index + 1
     if @issue.save
       call_hook(:controller_issues_new_after_save, { :params => params, :issue => @issue})
       respond_to do |format|
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index dbe292f76..30b2e7a21 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1841,7 +1841,7 @@ module ApplicationHelper
     # course_all_course_link = link_to l(:label_course_all), {:controller => 'courses', :action => 'index'}
     course_teacher_all_link = link_to l(:label_teacher_all), {:controller => 'users', :action => 'index', :role => 'teacher', :host => Setting.course_domain}
     # courses_link = link_to l(:label_course_practice), {:controller => 'courses', :action => 'index'}
-    users_link = link_to l(:label_software_user), {:controller => 'users', :action => 'index', :host => Setting.user_domain}
+    #users_link = link_to l(:label_software_user), {:controller => 'users', :action => 'index', :host => Setting.user_domain}
     # contest_link = link_to l(:label_contest_innovate), {:controller => 'contests', :action => 'index'}
     bids_link = link_to l(:label_requirement_enterprise), {:controller => 'bids', :action => 'index'}
     forum_link = link_to l(:label_forum_all), {:controller => "forums", :action => "index"}
@@ -1860,7 +1860,7 @@ module ApplicationHelper
 
     nav_list.push(courses_link) if @nav_dispaly_course_label && @show_course == 1
     # nav_list.push(projects_link) if @nav_dispaly_project_label
-    nav_list.push(users_link) if @nav_dispaly_user_label
+    #nav_list.push(users_link) if @nav_dispaly_user_label
     # nav_list.push(contest_link) if @nav_dispaly_contest_label  && @show_contest == 1
     nav_list.push(bids_link) if @nav_dispaly_bid_label
     nav_list.push(forum_link) if @nav_dispaly_forum_label
diff --git a/app/models/message.rb b/app/models/message.rb
index 413a4f91c..85a87132d 100644
--- a/app/models/message.rb
+++ b/app/models/message.rb
@@ -164,8 +164,11 @@ class Message < ActiveRecord::Base
   # Author lizanle
   # Description 
   def act_as_forge_activity
-    self.forge_acts << ForgeActivity.new(:user_id => self.author_id,
-                                           :project_id => self.board.project.id)
+    # 如果project为空，那么就是课程相关的消息
+    if !self.board.project.nil?
+      self.forge_acts << ForgeActivity.new(:user_id => self.author_id,
+                                             :project_id => self.board.project.id)
+    end
   end
   
   #更新用户分数     -by zjc
diff --git a/app/models/news.rb b/app/models/news.rb
index fa9f31712..d2547fc02 100644
--- a/app/models/news.rb
+++ b/app/models/news.rb
@@ -98,8 +98,11 @@ class News < ActiveRecord::Base
   # Author lizanle
   # Description 公用表中也要记录
   def act_as_forge_activity
-    self.forge_acts << ForgeActivity.new(:user_id => self.author_id,
-                                         :project_id => self.project.id)
+    # 如果是project为空，那么是课程相关的，不需要保存
+    if !self.project.nil?
+      self.forge_acts << ForgeActivity.new(:user_id => self.author_id,
+                                             :project_id => self.project.id)
+    end
   end
 
 end
diff --git a/app/views/poll/_edit_head.html.erb b/app/views/poll/_edit_head.html.erb
index dfa5b5cfc..c74453f6d 100644
--- a/app/views/poll/_edit_head.html.erb
+++ b/app/views/poll/_edit_head.html.erb
@@ -4,9 +4,14 @@
         <input type="text" maxlength="100" name="polls_name" id="polls_title" value="<%= @poll.polls_name %>" class="input_title" placeholder="问卷标题"/>
       </div>
       <div class="ur_title_editor_prefix">
-        <textarea name="polls_description" maxlength="300" id="polls_description" class="textarea_editor"><%= @poll.polls_description%></textarea>
+        <div contenteditable="true" id="polls_description_div" class="ur_textbox" style="min-height: 150px;width: 100%;background-color: #ffffff" onkeyup="edit_head();">
+          <%= @poll.polls_description.nil? ? "" : @poll.polls_description.html_safe%>
+        </div>
+        <textarea name="polls_description" maxlength="300" id="polls_description" class="textarea_editor" style="display: none">
+            <%= @poll.polls_description%>
+        </textarea>
       </div>
-      <div class="ur_editor_footer">
+      <div class="ur_editor_footer" style="padding-top: 10px;">
         <a class="btn_submit" data-button="ok" onclick="pollsSubmit($(this));">
           <%= l(:label_button_ok)%>
         </a>
diff --git a/app/views/poll/_poll_form.html.erb b/app/views/poll/_poll_form.html.erb
index 658d8a9b7..b73de94e0 100644
--- a/app/views/poll/_poll_form.html.erb
+++ b/app/views/poll/_poll_form.html.erb
@@ -7,6 +7,11 @@
   <%#= javascript_include_tag "polls" %>
 
   <script type="text/javascript">
+    //编辑问卷描述之后
+    function edit_head(){
+        $("#polls_description").val($("#polls_description_div").html());
+    }
+
       function add_MC(){
           $("#new_poll_question").html("<%= escape_javascript(render :partial => 'new_MC') %>");
           $("#poll_questions_title").focus();
diff --git a/app/views/poll/_show_head.html.erb b/app/views/poll/_show_head.html.erb
index ce74dc10a..b4ecdd3d1 100644
--- a/app/views/poll/_show_head.html.erb
+++ b/app/views/poll/_show_head.html.erb
@@ -3,8 +3,6 @@
   <h1 class="ur_page_title" id="polls_name_h">
     <%= poll.polls_name%>
   </h1>
-  <p class="ur_prefix_content" id="polls_description_p">
-    <%= @poll.polls_description%>
-  </p>
+  <%= @poll.polls_description.nil? ? "" : @poll.polls_description.html_safe%>
   <div class="cl"></div>
 </div><!--头部显示 end-->
\ No newline at end of file
diff --git a/app/views/poll/publish_poll.js.erb b/app/views/poll/publish_poll.js.erb
index 6074df6c6..2e8dab181 100644
--- a/app/views/poll/publish_poll.js.erb
+++ b/app/views/poll/publish_poll.js.erb
@@ -1,6 +1,6 @@
 $("#polls_<%= @poll.id %>").html("<%= escape_javascript(render :partial => 'poll',:locals => {:poll => @poll}) %>");
 $('#ajax-modal').html("<%= escape_javascript(render :partial => 'alert', locals: { :message => l(:label_memo_create_succ)}) %>");
-showModal('ajax-modal', '180px');
+showModal('ajax-modal', '250px');
 $('#ajax-modal').css('height','111px');
 $('#ajax-modal').siblings().remove();
 $('#ajax-modal').before("<span style='float: right;cursor:pointer;'>" +
diff --git a/app/views/poll/republish_poll.js.erb b/app/views/poll/republish_poll.js.erb
index 94369678d..f2fcee96a 100644
--- a/app/views/poll/republish_poll.js.erb
+++ b/app/views/poll/republish_poll.js.erb
@@ -1,6 +1,6 @@
 $("#polls_<%= @poll.id %>").html("<%= escape_javascript(render :partial => 'poll',:locals => {:poll => @poll}) %>");
 $('#ajax-modal').html("<%= escape_javascript(render :partial => 'alert', locals: { :message => l(:label_poll_republish_success)}) %>");
-showModal('ajax-modal', '180px');
+showModal('ajax-modal', '250px');
 $('#ajax-modal').css('height','80px');
 $('#ajax-modal').siblings().remove();
 $('#ajax-modal').before("<span style='float: right;cursor:pointer;'>" +
diff --git a/app/views/poll/show.html.erb b/app/views/poll/show.html.erb
index 08c2608d0..ae2691a91 100644
--- a/app/views/poll/show.html.erb
+++ b/app/views/poll/show.html.erb
@@ -34,7 +34,7 @@
       <%= @poll.polls_name%>
     </h1>
     <p class="ur_prefix_content">
-      <%= @poll.polls_description %>
+      <%= @poll.polls_description.html_safe %>
     </p>
   </div>
 
diff --git a/app/views/poll/update.js.erb b/app/views/poll/update.js.erb
index 15d0fabd5..098d478ad 100644
--- a/app/views/poll/update.js.erb
+++ b/app/views/poll/update.js.erb
@@ -1,6 +1,4 @@
-$("#polls_title").val("<%= @poll.polls_name%>");
-$("#polls_description").val("<%= @poll.polls_description %>");
-$("#polls_name_h").html("<%= @poll.polls_name %>");
-$("#polls_description_p").html("<%= @poll.polls_description %>");
+$("#polls_head_show").html("<%= escape_javascript(render :partial => 'show_head', :locals => {:poll => @poll}) %>");
+$("#polls_head_edit").html("<%= escape_javascript(render :partial => 'edit_head', :locals => {:poll => @poll}) %>");
 $("#polls_head_edit").hide();
 $("#polls_head_show").show();
\ No newline at end of file
diff --git a/app/views/welcome/index.html.erb b/app/views/welcome/index.html.erb
index a2fb9657a..b1a699afa 100644
--- a/app/views/welcome/index.html.erb
+++ b/app/views/welcome/index.html.erb
@@ -94,9 +94,13 @@
                   <% @organization_projects.map do |project| %>
                       <%= render :partial => 'hot_projects_list', :locals => {:project => project} %>
                   <% end %>
-                  <div id="errorExplanation">
-                    <%= l(:label_part_enterprise_tips) %>
-                  </div>
+                  <li>
+                    <h1></h1>
+                    <div id="errorExplanation">
+                      <%= l(:label_part_enterprise_tips) %>
+                    </div>
+                    <h1></h1>
+                  </li>
                   <% @part_projects.map do |project| %>
                       <%= render :partial => 'hot_projects_list', :locals => {:project => project} %>
                   <% end %>