Shane What is my screen resolution says my screen resolution is 1024 X 768. Dunno if you meant everything above and including 1024x768, or literally just everything above that. I've got Mozilla Firefox 13.0.1
The smallest I can make the window in Firefox (no zoom set) before the image starts getting cropped is 1223px page width (1264px window width, although that would be 20px less if maximised I think).