Tony (ynot) just posted about a database corruption on his unit. I've also had a constant rebuild problem (when connected at home though). It was suggested that deleting the playlist files from the drive and then rebuilding with emplode should fix it up.

In my case I was able to sync to fix the problem.

Find the other thread (I believe in the bugs forum) and take a look. I'd probably downgrade to 2.0b3 if I were you, try and connect, force a rebuild by making a change to a temp playlist, make sure everything's working fine at home and in car and then try upgrading to 2.0b7 again.

Bruno