Normally I do reset, forgot this time. And also, I was always taught to just set left and right margins to auto, never the way you described. I’ll give it a go though.
Edit: Did the recommended changes. Did not work.
Edit 2: As I said in the first post, its odd how it will work when I resize chrome, and it always works in IE and FF. Maybe i’ll try FTPing it and seeing it on another computer.