Serious bug or hack?

My opponent made a move (it says my turn), but I cannot move. I checked the PGN file and it says my opponent took his own pawn with his King. What? Anybody encounter this before? 

Thx.

PS: 

http://www.chess.com/echess/game.html?id=53546188

I did using my ipad

If you're trying a move that puts your king in check it wont let you.  You also cant move that if the piece simply doesnt move that way(for example moving your king half across the board in one move). 

If you cant even pick up the piece, then maybe something is wrong with your internet connection and the page hasnt finished loading.

If the piece simply wont move, then take a look at the link below.

http://www.chess.com/help.html 

Don't worry, I know how all the pieces move and my King is not in check. I believe my opponent made an illegal move, look at my link. 

To which move are you referring?

Hi Sahasrara, If the game is still showing your turn and you cannot move then I would contact the staff with the link to the game through the help link that FrenchMarie sent you.  I clicked on the link you posted.  I did not see any illegal moves, but on my screen it is showing that you made the last move and that it is still your turn.  For whatever reason it appears the game just didn't switch to black's turn, I'm sure staff can sort it out for you quickly.  Good luck!

As Menamow said, it should be his turn, but it still says my turn...If you download the PGN file (moves file). It shows that the opponent HAS made a move, but it is King take pawn (his own?!). 

Regardless, I reported it to the support, we'll see what happens. 

This is pretty wierd. I downloaded the pgn that shows the last move as Kxg7.