Blogger is doing a most unkind thing with profile pics - it scales to fit and does not respect the aspect ratio.
I've updated my profile pic to match the "acceptable" ratio on the full-size profile page (FYI everything is scaled to 140px wide and 180px tall). Previously it was stretching it width-ways and making me look like the fat-mirror in the hall of mirrors. :P
Of course my profile pic is a few years old now... but still close enough to life for people to recognise me, and I'd like it to stay that way.