It is the only one that shows up that way. If I disable signatures, I won't see anyone's signature. I like to see what people are using. I can just skip any post that is stretched out, my choice.
BTW, I have a 22" widescreen monitor, and the resolution is set correctly (1680 x 1050).
I think I have same as your monitor 22' widescreen 1680x1050. Is your montior Acer X223W, right? I see everyone signatures fine.