External HD monitor blurry

[Ghostmut]

Yes it runs fine at a lower resolution in full screen but that is not ideal. From what i can gather, the game is automatically pushing it to 1080i because sometimes when i quit the game, my whole monitor is still blurry so i access to the system preferences and sure enough, its at 1080i.

Im running snow leopard 10.6.8

thanks for your time to reply by the way, i really appreciate it.