Hi I would like to show you a 'CSS theme' that I created for my own pleasure.
I tried to it to look like Vista styles, and it shrink all the wasteful space that the original theme it has.

All that you have to do to have this theme is to install stylish extension and after that install the following stylish script at:

http://userstyles.org/styles/7130

You can preview there the theme. Sorry for my english.