Running 5.0.7 NE x86_64.
If I click the "IM beta" tab or if I type the "gi" shortcut most of the time the left pane does not refresh with the buddy list. Instead it continues to contain the email folder list.
The odd thing is sometimes this works for a while and then it stops working during the same ZCS session. It's prevented me from rolling this feature out to my users.
I haven't yet seen this happen on my test machine.