Ticket #22354: 22354.patch

wp-includes/pluggable.php

@@ -1640 +1640 @@
         if ( 'mystery' == $default )
                 $default = "$host/avatar/ad516503a11cd5ca435acc9bb6523536?s={$size}"; // ad516503a11cd5ca435acc9bb6523536 == md5('unknown@gravatar.com')
         elseif ( 'blank' == $default )
-                $default = includes_url('images/blank.gif');
+                $default = ( empty($email) ) ? includes_url('images/blank.gif') : 'blank';
         elseif ( !empty($email) && 'gravatar_default' == $default )
                 $default = '';
         elseif ( 'gravatar_default' == $default )