Bug estranho..

app/views/wiki/versions.html.haml

@@ -25,7 +25,7 @@
           %td.narrow
             %input{:type => "radio", :name => "to", :value => entry.version, :onclick => %"history_to(#{entry.version})"}
           %td= link_to(entry.updated_at.strftime("%d/%m/%y %H:%M:%S"), course_wiki_url(@course, @wiki_page, :version => entry.version))
-          %td= link_to truncate(h(entry.user.display_name), 20), user_path(entry.user)
+          %td= link_to truncate(h(User.find(entry.user_id).display_name), 20), user_path(User.find(entry.user_id))
           %td
             = entry.description
             - if (entry.version > @wiki_page.versions.minimum(:version))