The only thing I can think of that has changes recently is that I updated the Microsoft Error Reporting a couple days ago, but now on 2 different Macbook Pro's (both running Mountain Lion), Outlook freezes with the beach ball.   If I wait several minutes it eventually unfreezes, but since email is critical, its very frustrating.  I've noticed this behaviour on 2 different machines today.   Both are connected to an Exchange server and multiple IMAP server as well.   Any ideas?