If you have windows 7 desktop and you want to look like ubuntu 11.04 use this theme.
Quote from the author
I have done my very best to stay true to the theme and keep it as authentic as possible by using the correct fonts and colors wherever I could. One obvious deviation would be the scrollbars. I "borrowed" the look from an earlier version because the v11.4 scrollbars don't really work well in a windows environment.
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