Are you running it off of your music partition? I *believe* there's a known issue where if you have programs running on your music partition, fsck complains, or something else during the synchroni[sz]ation process fails.

Aha. I got into the habit of keeping things in my music partition, because I was shuffling some pretty big files in and out for a while. Now that it's settled down, I'll move everything over to /usr/bin/local, or something. Thanks!