Was looking to set-up my Forum avatar and could not find an upload option. Selecting any of yours gives a database error:
phpBB Debug] PHP Notice: in file /includes/functions_user.php on line 2245: getimagesize(./images/avatars/gallery//AVATAR37.png) [function.getimagesize]: failed to open stream: No such file or directory
Thank you for letting us know about the error with the avatars, this has now been corrected.
You should now be able to select an avatar from the gallery as normal.
At this time we are not allowing external avatars to be used which is why you were unable to find this option.