Seeing as about 60 people read this and no one suggested any solutions, I took it upon myself to experiment and search for the answer. I read a few other threads on similar issues, without solutions. I decided to delete the paired PC from the N900, uninstall PC Suite from the PC, restart the N900 and the PC, reinstall PC Suite on the PC, reset the paired bluetooth device passkey, so pretty much got rid of everything and started fresh, and it worked. I was again able to sync to PC Suite over bluetooth. If the same issue happens again, I'll try this same sequence again.