Users are unable to upload avatars. It used to work. User goes into their profile and selects the upload avatar option and chooses the file. After Submit the option disappears (no radio buttons are selected) and the file isn't uploaded. I tested the other three options (no avatar, URL link to avatar, use stock avatar) and they all work fine. Just the upload is ignored. I tested the avatar folder setting and the folder exists and is writeable. I've run out of things to check.
