Just got a Macbook Pro 15" and upgraded to Leopard. I'm a new Mac user. Bought a MyBook WD 500GB external drive connected by firewire. All OK and timemachine seems to be doing what it's told. Why is it that one user account can see all of the backups but another has only got the last few? I have three days worth of backups on one users view but another user account has only got the last 3 or 4 hours....and I'm sure that that account had performed backups before today?