diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index bef128e50..f1fc1fc15 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -172,7 +172,7 @@ class AttachmentsController < ApplicationController
 
     respond_to do |format|
       # modify by nwb
-      if @attachment.container_type == 'Course'
+      if @attachment.container.is_a?(Course) || @attachment.container.course
         if @course.nil?
           format.html { redirect_to_referer_or forum_memo_path(@attachment.container.forum, @attachment.container) }
         else
@@ -285,6 +285,8 @@ private
     raise ActiveRecord::RecordNotFound if params[:filename] && params[:filename] != @attachment.filename
     if @attachment.container_type == 'Course'
       @course = @attachment.course
+    elsif @attachment.container.course
+      @course = @attachment.container.course
     else
       unless @attachment.container_type == 'Bid' || @attachment.container_type == 'HomeworkAttach' || @attachment.container_type == 'Memo' || @attachment.container_type == 'Softapplication'
         @project = @attachment.project
diff --git a/app/controllers/news_controller.rb b/app/controllers/news_controller.rb
index 8bce84f90..650f65555 100644
--- a/app/controllers/news_controller.rb
+++ b/app/controllers/news_controller.rb
@@ -98,10 +98,12 @@ class NewsController < ApplicationController
   end
 
   def new
-    @news = News.new(:project => @project, :author => User.current)
-    @course_tag = @project.project_type
-    if @course_tag
-    render :layout => 'base_courses'
+    #modify by nwb
+    if @project
+      @news = News.new(:project => @project, :author => User.current)
+    elsif @course
+      @news = News.new(:course => @course, :author => User.current)
+      render :layout => 'base_courses'
     end
   end
 
diff --git a/lib/plugins/acts_as_attachable/lib/acts_as_attachable.rb b/lib/plugins/acts_as_attachable/lib/acts_as_attachable.rb
index 1318f8afa..8b368ab1e 100644
--- a/lib/plugins/acts_as_attachable/lib/acts_as_attachable.rb
+++ b/lib/plugins/acts_as_attachable/lib/acts_as_attachable.rb
@@ -83,6 +83,12 @@ module Redmine
         end
 
         def save_attachments(attachments, author=User.current)
+          # 清除临时文件
+          tempAttach = attachments[:dummy]
+          if  tempAttach && tempAttach[:file]
+            attachments.delete(:dummy)
+          end
+
           if attachments.is_a?(Hash)
             attachments = attachments.stringify_keys
             attachments = attachments.to_a.sort {|a, b|