I was watching a video on my mid-2010 MacBook Pro for an hour. The video ended and I closed Quicktime and walked away for about 30 minutes. When I came back, the laptop was unresponsive. I assume the battery died, though it seems it died very quickly. I plugged the computer in, and it turned on by itself. It "resumed" where it left off, but Firefox had closed itself, it was asking me to select a wireless network (it never asks me this - it always connects to my home network automatically) and the system date said Dec 31, 2000. I restarted the computer hoping maybe that would return things to normal. When it turned on, it warned me that the date was set prior to 2008, which may cause certain applications to act erratically. I manually connected to my wireless router and typed in the password - which I never had to do. It forgot the password (why?). Then the date automatically got set. I started up firefox, but the Session manager said the session window data was corrupt due to an illegal character. I've never seen this message before. So firefox couldn't remember my last session, but it remembers my browser history. Is this normal behavior when the battery dies?