Hmm..I think I spoke too soon in another post and jinxed the sync's in the process:) on my laptop (keep in mind, I transferred over 2gb on my desktop without any problems), my second sync failed with the above error code. The sync started out w/ the disk checking, and then uploaded the song. When it was done/trying to get music list from the empeg, the error code popped up. The empeg is still displaying the synchro... message.
I killed the power to the empeg and restarted it. Restarted emplode, music database came up, everything in the last upload session was there in the correct place. It's almost as if the empeg never got the final message to quit displaying the sync icon...
...proud to have one of the first Mark I units