Having bought and installed Leopard, I did what any right-thinking individual would do. I went out and bought my first external HD and fired up time machine. Everything went smoothly for a good couple months. Then one day I started noticing that even though I had not generated much since my previous backup, my sessions with time machine were getting larger and larger. First, a few hundred megs, finally 1.8 gigs, even though I hadn't done much. At that point, I wiped the drive and started all over again, just out of anger and frustration. But I have found that even though I am not doing very much, my backups started out again as hundreds of megs. I have a suspicion that it is just a huge empty block. but I don't know why, or how to stop it. Does anyone have an explanation or a solution to how I can stop this?? I hate chewing up hundreds of megs for nothing. The drive will be full way before it should be with this madness. thanks for any help.