What's wrong with my Blueray playback?

I've had my Blueray player(80Gig MGS PS3) for a while. I just got a Blueray disc for my B-Day today(Ironman). Popped it in, and the screens a little especially on the bottom portion, and is most often when there's alot of motion or color change. I tried Ironman on DVD and it was fine, other than being poorer picture quality. I thought it was the disc, so I exchanged it for the same one. While the picture was slightly better, it still looked off. So I'm assuming it's my PS3. I think there's a problem with the frame rate. Can anyone give me some help?