The Apple support forum contains numerous references to a Snow Leopard bug that result in the deletion of all of the user account data.
Details are vague on this bug, but there seems to be two conditions that need to be met:
- Users have to have upgraded from Mac OS X 10.6 (Leopard) to 10.6 (Snow Leopard) with the Guest account active.
- The data deletion seems to occur when users log into the Guest account and then log back into their own account.
Apple is so far silent on this matter, but a temporary workaround to protect your data (if it's not already been hosed) is to disable the Guest account.
Oh, and keep your backups handy ...
Any readers affected by this bug?