A 40-yard Pass Interference call (which was Pass Interference).
No, it really wasn't. The officiating was terrible, and that was one of the worst examples.
Steel, you're being intellectually dishonest if you think that there's not a world of difference between Kitna and Palmer. The Bengals lost because Palmer went down, not because of their defense. If Palmer stayed in the game then the Bengals would have easily scored more than 31 points. The entire complexion of the game would have changed, the Bengals wouldn't have come out so flat in the second half (which was apparently caused by some sort of halftime incident in the locker room that probably wouldn't have happened if Palmer was still healthy), and Ben would have had to throw more than 19 times or whatever it was. And when the Steelers have to pass they lose. I'm sure they'll have to put the ball in the air 35+ times this weekend and we'll all get to see what an elite quarterback Ben Roethlisberger really is.
I guarantee the Colts are thrilled to be playing the Steelers as opposed to a Carson Palmer led Bengals team.
Come Sunday none of this is really going to matter anymore. Go Colts!