Map Margins

[JamesJimmycoMarcus]

I set the margins of the map to zero, but there are still margins. I want the map to span the screen horizontally.

Here is a screen where it is working right:
http://www.tiggzi.com/preview/24572/m...

And here is the screen in question:
http://www.tiggzi.com/preview/24572/m...

[maxkatz]

Here is what I get, I don't see margins on either of the screen shots: