I love how Trusty puts
"-Trusty" even after "......"
Click "Settings" and then click the avatar thingy on the left hand side.So upload a file from you computer or copy the URL of a pic via the internet.
At the top right corner just left to "log out" it says "settings". Click on it and look on the left side under the "my profile" tab. You'll see the options to edit your avatar and signature plus 2 other things.
Edit: Wolfy ninja'd me
Definately works now for all those wanting to know
Zevrow