Rated 5 out of 5 stars
I have been using this for a long time, mainly because it keeps the row spacing in the bookmarks list tight. I recently updated to FF4 (release), and noticed that the row spacing is a bit bigger now. I hope this can be fixed in the future, but otherwise, it's still a nice, compact theme.
Update: Found out that disabling hardware acceleration fixes the spacing issue. Under Windows, D2D seems to cause way too many font issues. So many sites looked very different, not to mention FF itself. You can do a workaround by enabling acceleration in the Tools/Options menu, but using about:config to changing gfx.direct2.disabled to TRUE. This may slow text rendering and composition down a bit, but still leave some forms of Direct 3D acceleration. Unless you have a very complicated site on a slow computer, I wonder if you'd even notice.