Many thanks to the Exchange team for releasing this update. It actually fixes a number issues we were experiencing and/or want to proactively avoid as we expect to encounter them very soon.
Of special note for my team are the following:
Synchronization of an organizational forms library fails when you use Outlook in Cache mode in an Exchange Server 2010 environment (this is HUGE as this has been an issue since we migrated to Exchange 2010).
http://support.microsoft.com/kb/2572029
You cannot access a mailbox for several hours after you disconnect and then reconnect the mailbox in an Exchange Server 2010 SP2 environment (we routinely have to run clean-database to remediate this issue).
http://support.microsoft.com/kb/2682047
You cannot create a mailbox or mail-enable a mailbox for a disabled user account in an Exchange Server 2010 environment (this is a welcome modification so we can cut down on the back and forth with our customers)
http://support.microsoft.com/kb/2706523
Thanks again!