This is a user style that themes that new mysterious dark panel on Google websites in Ubuntu style.
When I first saw it, I just felt it reminded me of something... Ubuntu!
In order to use it, place the css file in
In Opera, right click on a Google page, click the 'display' tab and choose the css file from where you saved it (for example in ~/.opera/styles)
In Internet Explorer, click Internet Options -> Accessibility -> General tab.
Click the check box for "Format documents using my style sheet" and choose the css file.