Index: src/wp-admin/js/common.js
===================================================================
--- src/wp-admin/js/common.js	(revision 26079)
+++ src/wp-admin/js/common.js	(working copy)
@@ -70,7 +70,7 @@
 $(document).ready(function(){columns.init();});
 
 validateForm = function( form ) {
-	return !$( form ).find('.form-required').filter( function() { return $('input:visible', this).val() == ''; } ).addClass( 'form-invalid' ).find('input:visible').change( function() { $(this).closest('.form-invalid').removeClass( 'form-invalid' ); } ).size();
+	return !$( form ).find('.form-required').filter( function() { return $('input:visible', this).val() === ''; } ).addClass( 'form-invalid' ).find('input:visible').change( function() { $(this).closest('.form-invalid').removeClass( 'form-invalid' ); } ).size();
 }
 
 // stub for doing better warnings
@@ -300,7 +300,7 @@
 		// toggle "check all" checkboxes
 		var unchecked = $(this).closest('tbody').find(':checkbox').filter(':visible').not(':checked');
 		$(this).closest('table').children('thead, tfoot').find(':checkbox').prop('checked', function() {
-			return ( 0 == unchecked.length );
+			return ( 0 === unchecked.length );
 		});
 
 		return true;