The font looks smaller to me too. Maybe it's just a different, thinner font?

There's a big problem with the BF screen width. It doesn't go narrower than about 1200 pixels. A narrower browser width makes it scroll left to right off the edge of the window. It didn't do that before. It re-wraps correctly as the browser width is changed, but stops at about 1200 pixels. It's broken in both Firefox and IE.

The BF width is correct if Firefox is run full screen, but I have 1920x1080 pixels, so I never run Firefox that wide. I normally read posts at approximately ( I'm guessing) 800 pixels. It's much easier to read narrow width paragraphs of text.

Otherwise, the changes look good.