What is the image for the Default Avatar, so it will show a Default Avatarfor people who have not got a Avatar yet?
There isn't a default avatar as such, you'd need to run an SQL query to give everyone an avatar by putting the URL to a chosen avatar into the avatar column of the users table.
UPDATE `mybb_users` SET `avatar` = 'URL to avatar' WHERE `avatar` = '';
Then this for future users:
http://mods.mybboard.net/view/default-profile
