I thought the Firmware had fixed the sleep issues that all of the sudden began to plague my MBP. It did not. For some reason, when I close the display to my MBP, it does not enter sleep mode. It turns off the backlight, but will remain on. I have to tell it to go to sleep before I close the display. The weird thing is, I was not having this problem until I read about it on this forum. And, literally, that same day, mine started doing it. Probably a coincidence, but weird nonetheless. If anyone knows anything about this issue, advice would be great. Or, if you are having similar issues, tell us about it.