Originally Posted by kensal
I've had the same problem, however it's been intermittent. Use the reset hole next to the USB port. Poke it with a paper clip and presto! Reboots every time. No need to do a battery pull. At least that's been my experience.
I have a full sized EE, not the PE, so I don't have a reset button. And for me it happens EVERY time I hibernate!