I tried to look up related problems with this, but I haven't been able to find a solution. After leaving my computer on, charged, and step away, sometimes it logs my account off. When I come back, log on, all my applications have been turned off. I have adjusted the settings under "Energy Saver" and allow the computer a longer sleep time, but that doesn't seem to work.
OS X Version 10.8.2 Any suggestions?