[SjPdX]

I've seen this at the Bellagio too. The dealer said that to win the pot in a showdown, you have to show both cards. However, this situation was not at a showdown. The offending player pulled cards out of the muck.

I agree, bad form to touch the muck and a poor dealer to allow it to happen without mention. Not enough of a violation to get in the dealers face though, unless it happened again.