Can anyone help me?

This is my blog main page:
www.jumpd.com

but if you go to

http://jumpd.com/?p=2#comments

why does it get so wide? how can i fix this?

What's wide? Looks ok here.....

http://jumpd.com/wide.jpg

that's not what i see here, no white space in the middle.....using IE

damn FireFox problem, other friend doesnt see it has IE..
:|