To get rid of the default question mark avatars when a member hasn't uploaded an avatar we have a new thingie that uses the first 2 letters of your username as the default avatar. To change it back to your regular avatar, hover on your user name on the top right and select "dynamic avatar" and pick which one you want to use. Then pic the background color. See the pics attached. Note: if you don't see the available colors at first, click the letters avatar and then click save changes. On the next screen that loads you can pick the background color and then click save again.