Ah yes, that did happen to me too! Both times I think, and I already reinstalled once... not too big a deal: 20 min install then another 10 min restoring everything with TI backup by hitting "ok" then "next" a hundred times to install everything again.
How do you avoid it happening again? Do you always power off, and only hibernate if plugged in?
I don't see the pattern, I've left it in hibernate for days, and it never died or lost a charge; but other times it would die in hibernation in a couple hours. is there a tutorial explaining it?
Lastly, anyone that knows how to write apps for the device, a memory reset app would be a godsend!