I regularly leave my PC on and after a time it hibernates. When it comes
back from hibernation, I usually have to re-configure a bluetooth connection
(the Microsoft one) to allow the synchronization to work.
Sometimes it works... sometimes it doesn't and I have to restart my PC.

Windows XP Professional SP2
Office 2002

See More: Nokia Suite, 6280, Bluetooth and Office 2002...the woes continue