I was hoping you said that only the clock/time in the forum was off (this does happen sometimes with the software - a bug they should fix some day) but if everything is going and you have a new battery - I'm stumped. Then again, I'm seriously NOT a techie guy, so no surprise there.
I had a friend who was having problems and I tried helping him over the phone - his computer just kept shutting OFF and HE thought it was only doing it at the monitor at first. Later we figured out his whole computer was going down and he ended up taking it to a tech - turned out his TRANSFORMER which ran the fans, etc., was dead and his processor was over heating.
It doesn't sound like that is your problem obviously, but it goes to show that sometimes the problem isn't where you are looking. I know someone here will have an idea or two - good luck!