Forgot that $isEmpty takes an argument...

Author: davidlgj

dist/schema-form.js

@@ -2302,7 +2302,7 @@ angular.module('schemaForm').directive('schemaValidate', ['sfValidator', '$parse
 
               // In Angular 1.3 setting undefined as a viewValue does not trigger parsers
               // so we need to do a special required check. Fortunately we have $isEmpty
-              if (form.required && ngModel.$isEmpty()) {
+              if (form.required && ngModel.$isEmpty(ngModel.$modelValue)) {
                 ngModel.$setValidity('tv4-302', false);
               }