Index: wp-admin/includes/dashboard.php
===================================================================
--- wp-admin/includes/dashboard.php	(revision 10229)
+++ wp-admin/includes/dashboard.php	(working copy)
@@ -281,7 +281,7 @@
 
 	update_right_now_message();
 
-	echo "\n\t".'</div>';
+	echo "\n\t".'<br class="clear" /></div>';
 	do_action( 'rightnow_end' );
 	do_action( 'activity_box_end' );
 }