my original 3.2ghz 775 (i foget, thats a 530 i think or was it 550 ?) was like that too it was impossible to cool even on water.
the center of the heat spreader had a massive depression so that the heatsink only sat on the corners.

i took my drivers license and laid it across the heat spreader with the thin edge and took pictures,, sent them off to intel and never heard a friggin word.. i was VERY pissed off. there was an OBVIOUS massive gap at the center of the IHS, very depressing.. haha pun intended!

all the amd64 chips i been thru.... never ever had one do that.