I'm all out of ideas. 3 days ago Time Machine started backing up gigabytes each time (every hour) even if I leave the machine sitting there doing nothing, with nothing running. Is there any way I can find out WHAT it is backing up that is so large, or changing so often? It's been fine since I installed Leopard, and I haven't installed anything new in weeks. All I've been working on is a pet flash project, that doesn't even size to a megabyte right now. Stumped. Thanks in advance.