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Not having any problems here. Did the "Combo" update just because I like to do that. Running mail, web, iChat, ADB, iCal, OD, most of the "main" features. Running smooth on my Mini server.
 
There is an iChat bug popping up for some people. iChat fails to start.

Turns out the jabberd2.db is corrupt. Most are recommending that it be deleted:

/private/var/jabberd/sqlite/jabberd2.db

Although it is possible that it is a permissions issue or that it could be repaired.

SUS is still broken, the 10.6.3 update is not processed properly although it does appear to clients.
 
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