add 'read' class ro read messages to match the 'unread' class associated with unread messages. This will keep us from attaching jquery functionality to notification types we may not know about.

app/views/notifications/index.html.haml

@@ -21,7 +21,7 @@
 
         .span-8.notifications_for_day
           - notes.each do |note|
-            .stream_element{:data=>{:guid => note.id}, :class => "#{note.unread ? 'unread' : ''}"}
+            .stream_element{:data=>{:guid => note.id}, :class => "#{note.unread ? 'unread' : 'read'}"}
               - if note.type == "Notifications::StartedSharing" && contact = current_user.contact_for(note[:target])
                 .right
                   = aspect_membership_dropdown(contact, note[:target], 'left')

app/views/notifications/index.mobile.haml

@@ -8,7 +8,7 @@
         = day
       %ul.notifications_for_day
         - notes.each do |note|
-          .stream_element{:data=>{:guid => note.id}, :class => "#{note.unread ? 'unread' : ''}"}
+          .stream_element{:data=>{:guid => note.id}, :class => "#{note.unread ? 'unread' : 'read'}"}
 
             = person_image_link(note.actors.last)