The stylesheet is built around having an avatar of 80x80 px, I hadn't realised that a 75x75 was used in issue 38, but if you look carefully, you can see that it looks out of place (more of a gap at the bottom). I don't know why they are different, but unless we modify the stylesheet, we should stick to 80x80. If you look at issues other than 38 you will see what I mean.