diff --git a/app/controllers/my_controller.rb b/app/controllers/my_controller.rb
index ebb7c2fc8..69d8bc3a6 100644
--- a/app/controllers/my_controller.rb
+++ b/app/controllers/my_controller.rb
@@ -122,7 +122,7 @@ class MyController < ApplicationController
 
         if @user.save && @se.save
           # 头像保存
-          FileUtils.mv diskfile1, diskfile, force: true
+          FileUtils.mv diskfile1, diskfile, force: true if File.exist? diskfile1
           @user.pref.save
           @user.notified_project_ids = (@user.mail_notification == 'selected' ? params[:notified_project_ids] : [])
           set_language_if_valid @user.language
diff --git a/app/views/messages/_form_course.html.erb b/app/views/messages/_form_course.html.erb
index 6b66b0fba..1161e9f8a 100644
--- a/app/views/messages/_form_course.html.erb
+++ b/app/views/messages/_form_course.html.erb
@@ -9,9 +9,9 @@
       <div style="display: none;"><%= f.text_field :subject, { size: 60, id: "message_subject",:class=>"talk_input w585 fl" }.merge(extra_option) %></div>
   <% else %>
       <%= f.text_field :subject, { size: 60, id: "message_subject", onkeyup: "regexSubject();",:class=>"talk_input w585" }.merge(extra_option) %>
+      <p id="subject_span" class="ml55"></p>
   <% end %>
   <div class="cl"></div>
-  <p id="subject_span" class="ml55"></p>
 </li>
 <li class="ml60 mb5">
   <% unless replying %>
diff --git a/db/schema.rb b/db/schema.rb
index cd5cb1599..e798dba1c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -438,6 +438,13 @@ ActiveRecord::Schema.define(:version => 20150505025537) do
 
   add_index "delayed_jobs", ["priority", "run_at"], :name => "delayed_jobs_priority"
 
+  create_table "discuss_demos", :force => true do |t|
+    t.string   "title"
+    t.text     "body"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+  end
+
   create_table "documents", :force => true do |t|
     t.integer  "project_id",                :default => 0,  :null => false
     t.integer  "category_id",               :default => 0,  :null => false
diff --git a/public/javascripts/course.js b/public/javascripts/course.js
index 46cc8b431..f0b1338da 100644
--- a/public/javascripts/course.js
+++ b/public/javascripts/course.js
@@ -526,6 +526,7 @@ $(function(){
 //查找TAG资源
 function search_tag_attachment(url,tag_name,q,course_id,sort)
 {
+    //alert("111");
     $.get(
         url,
         {
diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index 065c57bd0..f49ef22f1 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -481,7 +481,7 @@ a:hover.link_file{ background:url(../images/pic_file.png) 0 -25px no-repeat; col
 /*日历选择图*/
 img.ui-datepicker-trigger {
   display:block;
-  background:url(/images/public_icon.png) -31px 0 no-repeat;
+  background:url(../images/public_icon.png) -31px 0 no-repeat;
   cursor: pointer;
   vertical-align: middle;
   margin-left: 5px;