I have the HD VGA cable for my Xbox 360, which is hooked up to my 24" Spectre computer monitor. This monitor says right in the manual that it supports 1920x1080 @60hz, which the Xbox is outputting, but at the bottom of the screen everything is stretched vertically. When I have it connected to my computer and set it to that same resolution there is no problem

Another thing is that if I try to change the V or H position, pixel clock, or use the Auto Adjust feature, the screen stops displaying everything but leaves the back light on and won't respond.

Here's an image to show you what sort of thing is happening: