hi there.
i setup this in multisite
www.mysite.com
books.mysite.com

the image avatar was sucsessfuly appear in 'My account' in both sites..

im sharing this tables:
$db_prefix = array(
'default' => '',
'users' => 'xxx_www.',
'sessions' => 'xxx_www.',
'role' => 'xxx_www.',
'authmap' => 'xxx_www.',
'profile_fields' => 'xxx_www.',
'profile_values' => 'xxx_www.',
'global_avatar' => 'xxx_www.',

sucsesfully shared user and profile in both multistes.

but somehow when i make a comment in books.mysite.com.... my image avatar is not appear..
when i make a comment in www.mysite.com... the image avatar is appear..

how to make it appear in books.mysite.com?