Index: httpdocs_trunk/wp-includes/default-widgets.php
===================================================================
--- httpdocs_trunk/wp-includes/default-widgets.php	(revision 24807)
+++ httpdocs_trunk/wp-includes/default-widgets.php	(working copy)
@@ -360,7 +360,7 @@
 		echo $before_widget;
 		if ( $title )
 			echo $before_title . $title . $after_title;
-		echo '<div id="calendar_wrap">';
+		echo '<div class="calendar_wrap">';
 		get_calendar();
 		echo '</div>';
 		echo $after_widget;