I installed the 64-bit Vista Ultimate on my SR MBP (2007 summer version) about a month ago. Things seem to be working but recently, I started using the sleep function when carrying the laptop from one place to another. It seems that the sleep/hibernation function is not working. For example, after choosing sleep and put the laptop in a bag for about 15 minutes, it became very hot. (Note that after I chose sleep and waited for awhile, the LCD did blink.) Anybody knows how to fix the problem?