Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 6618)
+++ wp-admin/includes/template.php	(working copy)
@@ -364,6 +364,7 @@
 	$r = "<tr id='user-$user_object->ID'$style>
 		<td><input type='checkbox' name='users[]' id='user_{$user_object->ID}' class='$role' value='{$user_object->ID}' /> <label for='user_{$user_object->ID}'>{$user_object->ID}</label></td>
 		<td><label for='user_{$user_object->ID}'><strong>$user_object->user_login</strong></label></td>
+		<td><label for='user_{$user_object->ID}'><strong>$user_object->user_nicename</strong></label></td>
 		<td><label for='user_{$user_object->ID}'>$user_object->first_name $user_object->last_name</label></td>
 		<td><a href='mailto:$email' title='" . sprintf( __('e-mail: %s' ), $email ) . "'>$email</a></td>
 		<td><a href='$url' title='website: $url'>$short_url</a></td>";