In case anyone has missed it, you might notice I've turned on the user pictures in comments and posts. Just a bit of fun but adds some colour to the pages and easier to relate who's posted by a glance at the avatar on the right then trying to look for the name (you know - "Good with faces, no good with names" concept).

Anyhow, so everyone will get the 'Guest Rider' icon unless they upload a nice image. Up to 480x480px images are good as the site will resize for you. This size is good, because a larger version is shown on your profile compared to that shown by your posts.