Yes, happened to me frequently before the software update. It's happened a few times since, but mostly shortly after powering on. In other words, once I get the screen, I have to take the battery out and restart a few times in a row.

But, it only seems to happen when we're out in the sun, so I wondered whether the heat of direct sunlight in Mexico here is partly to blame. I have other battery issues (flickering LED) and a power cord that's not recognized for charging so enTourage and I suspect I actually have more going on than just that. But yes, I've been having that issue.

I haven't been able to get it to start charging for the last few days, so I'm hesitant to turn it on and play with it at all, in case something comes up and I need a charge to apply a fix, so I can't do much more trouble shooting right now.