fix-me: $100 open source bounty from seaofclouds

Got CSS chops? Fork this repo from seaofclouds, fix the layout and make one hundred bucks:

Scrollbars appear when they don’t need to. This is due to the 100% height / min-height style. I’ve tried many solutions; none have stuck.

Requirements

Fixed width and centered content and sidebar
Height of content and sidebar must be the same
Height of content and sidebar must grow to accommodate more content
Height of content and sidebar must not be shorter than window height
Height of header must remain flexible, and not impact the CSS used to fix this issue.
Content and sidebar background images contain gradients that must extend to fill 100% width
Scrollbars only when needed.
No Javascript to fix the problem (I realize that with jquery, it would be trivial to set the height, but there’s gotta be a way in CSS!)
Target Browsers: Firefox 3+, Safari 3+, bonus points for ie7+8 (separate stylesheet okay)