Merged r5185 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.1-stable@5575 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/wiki_controller.rb

@@ -93,9 +93,6 @@ class WikiController < ApplicationController
 
     # To prevent StaleObjectError exception when reverting to a previous version
     @content.version = @page.content.version
-  rescue ActiveRecord::StaleObjectError
-    # Optimistic locking exception
-    flash[:error] = l(:notice_locking_conflict)
   end
 
   verify :method => :put, :only => :update, :render => {:nothing => true, :status => :method_not_allowed }
@@ -131,7 +128,8 @@ class WikiController < ApplicationController
 
   rescue ActiveRecord::StaleObjectError
     # Optimistic locking exception
-    flash[:error] = l(:notice_locking_conflict)
+    flash.now[:error] = l(:notice_locking_conflict)
+    render :action => 'edit'
   end
 
   # rename a page