I've rebooted twice.  After the Messenger window comes up, the AT&T stay connected ad starts to load at the bottom of the window and then the Messenger window freezes.  Checking the Resource Monitor, it then proceeds to eat about 1MB a second from then on, suggesting a serious leak in the inline HTML advertisement.

 

In the time it took to write this post, Messenger has consumed an extra 50MB of memory, - it's now 'using' 460MB and rising.

I'm using Outlook 2011 for MAC and I have somehow accidentally added a contact as a resource.  Now that contact only shows up as a recent room when I add them to meeting invites.  This is deriving me CRAZY!  How do I fix this?  Thanks!