Ruling re: exposed card

[tipperdog]

Guy in 6 seat just won a big pot and has lots of chips piled in front of him. He is stacking them at a normal pace, not delaying or anything, and the dealer proceeds to deal the next hand before stacking is complete (all of which is completely normal).

When dealer pitches 2nd card, it flips up and exposes some random middle card. Stacking player doesn't seem to notice (or at least doesn't say anything). Two folds. I raise and all fold to the stacking player, who asks for a replacement card. He says the dealer pitched the card into the chip mass, causing it to flip. Dealer says it hit players' hand and is therefore his responsibility. Player vehemently denies that he touched the card. Other players at the table claim it's a misdeal.

Floor is called. What's the ruling? And does it matter if player touched the card?