Index: app/helpers/issues_helper.rb
===================================================================
--- app/helpers/issues_helper.rb	(revision 8917)
+++ app/helpers/issues_helper.rb	(working copy)
@@ -260,7 +260,7 @@
       s = l(:text_journal_changed_no_detail, :label => label)
       unless no_html
         diff_link = link_to 'diff',
-          {:controller => 'journals', :action => 'diff', :id => detail.journal_id, :detail_id => detail.id},
+          {:controller => 'journals', :action => 'diff', :id => detail.journal_id, :detail_id => detail.id, :only_path => false},
           :title => l(:label_view_diff)
         s << " (#{ diff_link })"
       end