I have this weard problem. I have Asus EAH4350 (ATi) and two 1920x1080 monitors (same model). When i connect both monitors to EAH4350, one in DVI and other in VGA, VGA monitor can't show picture correctly on 1920x1080 resolution. It allows to change it from settings, but monitors picture is like zoomed and it "expands" over the edges. There are newest drivers, etc. Any ideas?
Problem solved. My VGA cable was missing one pin (9. pin). So when i replaced with full 15-pin VGA cable, it started to work like charm. PC couldn't recognize monitors information with that original cable.