Build 3150 continues to have a problem that started, I believe, with build 3120. I have disabled safe sleep with the following: sudo pmset -a hibernatemode 0 and it used to take a few seconds to sleep. Now it takes 30-60 seconds on my MacBook Pro (Core Duo, the original) running 10.4.8, 2G memory. This is really annoying when you want to close the lid and go. If I take the Parallels folder out of the /LibraryStartupItems folder and reboot, then sleep is back to normal and fast.