BTW I upgraded my Macbook Pro to Leopard last week.

I suggest that you all copy your essential folders to a portable HD and then do a clean format and install.

Because my laptop crashed after 2 days and when I called Apple customer care they told me that some Tiger programs may be incompatible.

Lucky I could use the firewire target HD to transfer the files across otherwise my stuff would be gone.

Oh, BTW the Backup for Tiger is not compatible with Leopard. So you won't be able to recover your files on Leopard using Backup from Tiger