Index: wp-admin/js/widgets.dev.js
===================================================================
--- wp-admin/js/widgets.dev.js	(revision 20966)
+++ wp-admin/js/widgets.dev.js	(working copy)
@@ -98,6 +98,7 @@
 			cursor: 'move',
 			distance: 2,
 			containment: 'document',
+			tolerance: 'pointer',
 			start: function(e,ui) {
 				ui.item.children('.widget-inside').hide();
 				ui.item.css({margin:'', 'width':''});