hi open my site in FF and IE and you will see big differnece In FF width setting working fine but IE is not supporting it.
You will never get IE to attempt to perform like the other more modern browsers without a proper doctype. Use this on your first line: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> Then validate your html and css for those lists of errors.