On the 24th of this month, I got the Thunderbolt Software Update (version 1.0), the Security Update 2011-05 (version 1.0), and the MacBook Pro EFI Software Update (version 2.8). Ever since I got these update, my screen has been going black about every 10 minutes even when I'm using it. The only way to fix it is to turn it off manually by holding down the power button. Now it has started happening right after the apple screen goes away when I turn the laptop on. Is the screen going black because of these updates or is it something else?