This does a number of things: makes the comments column 100px wider, boosts the comments and body font to 16px, darkens the font in both the post body and comments, makes the "reply" visible on hover again and changes its color and gets rid of the image, makes the comment number smaller and changes the color to blue, and fiddles with alignment issues on the right side. The width changes are hardcoded for my 1280px wide screen using FF, so may not work for you.

If you don't like something I've changed, the file is easy to edit from the Stylish tab on the add-ons window.

There are at least two other styles for BJ so if you don't like this one be sure to try the others