I have been having this problem recently, even after upgrading to beta 13. My 10gig is almost full (9.5) and it is impossible to sync without running into some errors. I am running XP and the only thing I can be sure of is the following:

1. When the unit was brand new there were never any problems. They started as the drive became full.

2. I have always used a router for my network and have used a 'store bought' cable at first. I have since extended my cables and have made my own. I am thinking that may be the problem.

3. I am using the ethernet connection.

A few more frustrating attempts to sync this unit and out the window it goes!

If you figure something out let me know.

Ed