Noticible Edges in PS3 Games--Because of 1080p?

[WeApOn]

Hi,

I have a 1080p native TV, and I own a PS3. I purchased Fight Night yesterday, and I have been noticing alot of edges in the game. I could see it in a few other games, but this one is very noticible in certain areas(like the ropes for the ring). To clarify a little-- It looks like what a PC game would look like with Antialiasing turned off.

I have NBA 07 which is a 1080p game, and that looks Perfect. So I was wondering if it was because of the upconversion causing it? It may just be the game, but I didn't notice this when I saw this game in Best Buy awhile ago. But I probably wasn't as picky then. I think my TV auto-adjusts to 720p instead of upconverting to 1080p.. Is this a good idea?

Any advise is greatly appreciated. Thanks.