I am having an issue with the layout of stpetersbhm.org with Firefox. The navigation displays on the left and the content on the right as it should, but the content starts below the navigation. It does not have this issue when I load the page from my computer instead of the server to test it. It uses PHP includes to load the separate elements of the page: header, footer, and navigation. I don't know if that has anything to do with the problem. The address of the CSS file is stpetersbhm.org/mainstyle.css. Any ideas about what the problem could be?
thanks,
Will