The gratuitously large amount of whitespace in comments pages is a little off-putting. The very, very light gray meta-info text on white bg is hard to read in the comments container; as is the kind-of-blue text on light blue bg. The icons are not descriptive enough as stand-alones to exist without text indication of what they do, or something similar.

So basically, this is just walking into the 'flat' fad without any careful thought. I'm just in disbelief. I'm primarily a back-end coder but I've designed better sites than this.

Edit: I realize I'm being a little bit mean, and I don't like being mean... but I think it's perhaps warranted this time given the name of the site.