#1 - Oct. 25, 2010, 8:43 p.m.
Just on the off chance this could be being impacted client-side, have you done a full reset UI and tested this prior to adding in ANY addons? I'd give that a go first, it may not help - but it cannot hurt and it's a really good idea for everyone after a patch this major.
To do a full reset UI, you will want to save your addons in another spot if you wish to preserve them.
Then rename/delete or move your WTF, Cache and Interface folders while WoW is shutdown. Reboot your system.
Note, if you are running Vista make sure your permissions are set so it does not undo your changes.
More detailed instructions for different operating systems, including Macs are here.
http://us.blizzard.com/support/article.xml?articleId=18761&searchQuery=reset%20UI&pageNumber=1