Header is broken
Using Jamroom
Looks like you have an extra #header ID in your CSS that is overriding the margin: auto from the skin - go into the ACP -> skins -> Style for MediaPro and press the "reset" next to the "header" section in the core_header.css file.
Make sure you're using Firefox with Firebug installed - it will save you a lot of time tracking these issues down. Just start up Firebug, click on the "CSS" tab, and then click on the small icon in the firebug toolbar that looks like a mouse pointer clicking on a small box - this will let you "live select" elements on your page and see what CSS is being applied to them.
Hope this helps!