So I've got a 100 GB HD in my Powerbook, and I have about 5 GB remaining. A few months ago I noticed that those 5 GB will start dissapearing to the point where it says "Startup disk almost full." If I restart, I get those 5 GB back. I used Applejack to clean the caches, which seemed to work--but the problem has cropped up again. Any ideas? Thanks.