Avatars are not hosted on this website, they are hosted and controlled by Gravatar.
Gravatar is a free service that allows you to universally change and manage your avatar across many different forums, blogs and websites though a central location.

To change your avatar for the Powder Toy website, you must first register an account with Gravatar (a very quick and easy process). Once you've registered, you can upload an avatar.

Just a reminder in case you forgot what e-mail you registered with: a rel="nofollow" href="mailto:l...@yahoo.com. Instead of using gravatar making you have profile can't you just upload photo's on your PC or MAC OSX can't we just upload them directly.