Vanna doesn't include helpers so we have to include them in views separately...

Vanna doesn't include helpers so we have to include them in views separately to use them. The absence of  this line was producing a deprecation warning for error_messages_for, because our helper redefines that method (it was removed from rails).

app/views/notifications/index.html.haml

 -self.extend AspectGlobalHelper
 -self.extend AspectsHelper
 -self.extend ApplicationHelper
+-self.extend ErrorMessagesHelper
 .span-13
   %h2
     %span.notification_count{:class => ('unread' if @notification_count > 0)}