I'd do just two small changes:
First, the comment's points are important and right now are hard to read/notice.
Second, I'm not a designer, but I've always heard you shouldn't use black typo on white background as it's a little bit to hard contrast, it's better to use a (very) dark grey on the type.
I'm using Chrome 10.0.6.648.204 on OS X.
Will see if using pseudo class for first element helps me out.
Also I normally avoid looking at Comment points to avoid any bias and bring neutrality in my reaction to a comment. Again this maybe different for you guys.
Also as a golden rule the popular comments (unless threaded) are on the top so not really that important for me.
Second: In design specifically the rules are not hardwired like physics. You can break them but you must know that you are breaking a rule when you do. Normally I use #333333 in all my works but somehow missed it here. Will correct and put up an updated version tonight.