solution ?
I think i have the answer... i've been freaking out all day too. I typically get 10 hours of video play on a full charge, and today, my battery lasted about 5 hours.
Any chance you were trying out the new multi-task button? Did you increase the brightness? Like laptops, the LCD consumes the most power.
Try setting the brightness back to default, and guage your battery life again.
I'm gonna be testing this out the next couple days