Index: pluggable.php
===================================================================
--- pluggable.php	(revision 7090)
+++ pluggable.php	(working copy)
@@ -1182,7 +1182,7 @@
  * @param string $default URL to a default image to use if no avatar is available
  * @return string <img> tag for the user's avatar
 */
-function get_avatar( $id_or_email, $size = '96', $default = '' ) {
+function get_avatar( $id_or_email, $size = '64', $default = '' ) {
 	if ( ! get_option('show_avatars') )
 		return false;