I bought Lion when it came out and I have consistently had a problem with the computer going to sleep like it should, but when I come to wake it up, it won't. The mouse and keyboard act like they are being seen. I can push the power button on the back and it will wake up, but the mouse and keyboard won't work. I have to do a hard reboot to get everything working again. I went back to Snow Leopard for a couple of months and just reinstalled Lion on my new SSD drive. 2 days later it's back to it's old ways of not waking up. This never happened with Snow Leopard installed. I don't want to pay Apple for a phone call and was hoping someone here could help me out.