We've applied a hotfix to the v0.1.33 update. This only applies to phpBB. If you downloaded v0.1.33 before this post and have phpBB, you'll want to re-download the update.
Bug Fix
phpBB gallery avatars will now work correctly.
Update Instructions
Delete the old functions_receive.php file and rename the functions_receive_phpbb.php to functions_receive.php. If you have made changes to your functions_receive.php file, do not delete the file/rename and just copy and paste the updates to the getAvatar function over.