Lately I've noticed that whenever I put my Mac to sleep, I lose a few megabytes. At first I didn't think anything about it. Until one day I let sleep for a while I was doing something, and came back to, and saw that I had lost about 300 megabytes. While it was in sleep, no applications were running and nothing was downloading. My mac is Macbook pro, 3 years old, 120 gigabyte, 2 gb of ram, 2.33 Ghz Intel Core duo, Model Identifier: 2,2, and Serial Number:W86481HGW0H Right now it's running leopard. I'm about to upgrade to Snow Leopard. So why would it lose this hard drive space when it's in sleep mode? By the way, I bought it used one year ago. So I've only had it a year. I haven't downloaded anything from any untrustworthy websites. I only download things from trusted sources(i.e. itunes.) Please help. Right now my only solution is to keep a close eye on it, and make sure that it does not go to sleep!