[dnanian]

This usually means you have two backups scheduled for the exact same time. Normally that'd be fine, but Leopard has a weird problem where this can end up launching multiple copies of SuperDuper!, which can cause this temporary file to give an error.

If you didn't intend to have two schedules, delete the one(s) you don't want. If you did, set one to run ONE minute before the other(s).