Ticket #19614: 19614.patch

wp-includes/pluggable.php

@@ -1628 +1628 @@
                         $default = $avatar_default;
         }
 
-        if ( !empty($email) )
+        if ( !empty($email) ) {
+                if( false !== strpos( $email, ' ' ) )
+                        $email = str_replace( ' ', '', $email );
                 $email_hash = md5( strtolower( $email ) );
+        }
 
         if ( is_ssl() ) {
                 $host = 'https://secure.gravatar.com';