I don't mind the colors, I'd just like the fonts to be smaller.
edit: zooming the text down two notches in firefox works for me. And it keeps the setting if the tab is closed and re-opened.
I don't think it's so much that the fonts need to be smaller, but that the white space is ridiculous.
With normal browser bars, one line posts, and reasonable signature lengths, it is impossible for me to get more than 5 posts displayed at a time with 1200 verticals pixels. Somebody should do a case study on this theme and how efficiently it wastes space.
Cliffs: 1200 vertical pixels = 5 lines of actual text :\