--- /Users/piotr/Desktop/drupal-7.0-rc2/misc/states.js	2010-12-06 17:10:29.000000000 +0100
+++ states.js	2010-12-17 14:00:30.000000000 +0100
@@ -65,6 +65,9 @@
     // The "reference" variable is a comparison function.
     return reference(value);
   }
+  'Array': function (reference, value) {
+  	return reference.indexOf(value) != -1;
+  }
 };
 
 states.Dependent.prototype = {