Hi there 2 days ago I got my Snow Leopard DVD – yeah. After making a full backup (time machine) of my system I started the simple update process. I just deselected some unused languages and let the system do the rest. After 20-30 minutes the Installation was aborted by a failure which was not described in detail. Afterwards I checked the file system and found a not repairable filesystem error. I rebooted the system, made some filesystem checks using the harddrive utility program and after an additional attempt of updating I did it and everything was working fine. If anybody has accounted the same problem and knows details, please post a comment here.