Had no problems with previous ipod but was returned because of a dock issue. Mac mini 1.5ghz core solo w/ 1gb ram with music from ubuntu box over samba ipod classic 160gb. Sync will lock up after no time at all. Once it got to 55/65 gbs and locked up though. But all got lost because it didn't finish properly. When I say lock up. I mean you can move the mouse but nothing is click able. Even if I go to manually manage. It'll lock up after just a few minutes. I'm trying to do an update now and sync again. But I'm sure it will lock up again. Thanks, zach.