In the bb_plugins.code.txt file the following line:

elseif($av!='' and $av=='*') $im="<br />{$a2}<img src...

should be:

elseif($av!='' and $av=='*') $im="<br />{$a1}<img src...

Also...

if($staticAvatarSize) $avatarDim='style="width:'.$maxAvatarWidth.'px;height:'.$maxAvatarHeight.'px"';

should be...

if($staticAvatarSize) $avatarDim=' style="width:'.$maxAvatarWidth.'px;height:'.$maxAvatarHeight.'px"';

space before "style=..."

Thank you for noticing that! We've fixed it all in the official avatars add-on now.