I also watched this without issues. There is variance between the players, although there are obvious consistent ones that affect all players such as the Paramount 7/29 releases. The variance I have with my player is that Iron Man stutters and has some audio drop outs during a 10 minute span which manifests itself at the half way mark. Every couple minutes, something happens but eventually it goes away.
I tried two different Iron Man discs just in case it was a bad pressing, same results for both and they played fine on the PS3.