Backported r2171 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/0.7-stable@2177 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/boards/show.rhtml

@@ -32,9 +32,9 @@
   <thead><tr>
     <th><%= l(:field_subject) %></th>
     <th><%= l(:field_author) %></th>
-    <%= sort_header_tag("#{Message.table_name}.created_on", :caption => l(:field_created_on)) %>
+    <%= sort_header_tag('created_on', :caption => l(:field_created_on)) %>
     <th><%= l(:label_reply_plural) %></th>
-    <%= sort_header_tag("#{Message.table_name}.updated_on", :caption => l(:label_message_last)) %>
+    <%= sort_header_tag('updated_on', :caption => l(:label_message_last)) %>
   </tr></thead>  
   <tbody>
   <% @topics.each do |topic| %>