I have not. This might be a bug
iPad client flipped out :(

well so far it only happened once. But it's very destructive if it happens in a game you're about to win. I wonder how many play on their ipads, vs computers, phones, etc. Are there any stats on that?

Hmm. It happened again. Only had 20 seconds left, i moved and the time is still running. Who can I contactabout this? :/

try this: http://support.chess.com/

I managed to solve the problem in two ways:
1. Restart the chess app, sometimes it resumes the game, and gets updated correctly
2. If 1 does not work, visit chess.com in Safari and click play live, and you can resume the game from there, and play in the browser. A little slower, but it works.
Not very funny and you'll maybe lose 30-60 seconds, but it's better than to lose the entire game on time :)
I was playing on my ipad and flipped back using the arrow to see previous moves. Suddenly, my time was running but I had already moved and I couldn't see the other player's move. And I couldn't do anything. Just wait for the time to run out. bummer. :(
Have anyone encountered this before?