trying to update my profile with an avatar and seem to be unable to, I browse to the file and hit update, page reloads with the image in the preview area, but the avatar at the top of the screen and in my posts do not change, still just the grey box.

guess it just took a day to update.

There's an extensive caching system in place (think about it, on patch days the site gets hammered) so some things do take some time to show up properly.