hi there.
i recently bought an xbox 360 arcade with hdmi on the back. i have at home a 46inch 1080p Sharp Aquos LCD tv. I bought a few games, which onb the back say that 1080p is supported.
i then go to the settings in menu and set the display to 1080p with the hdmi cable connected from xbox to tv. the came starts up and everything, HOWEVER, when in gameplay the still picture is fine, but when there is quick movement the picture kind of lags, and shakes and i cant explain it but its not smooth. its all in 60hz too.
HOW CAN I FIX It?
please help a gamer in need?

This sounds like a problem with either the game or the xbox. It isn't the cable or the t.v. unless the t.v. has the same problem when watching movies via hdmi. Then it could be a problem with the hdmi port. Really, there are too many variables with your problem, so this is the best answer I can give, unless we shortened it down to what exactly is causing the problem. If this problem only occurs with this one game, than it is most likely that the game claims it supports HD, but it doesn't do a good job of it.