Index: includes/content.rules.inc
===================================================================
--- includes/content.rules.inc	(revision 306)
+++ includes/content.rules.inc	(working copy)
@@ -222,8 +222,16 @@
   // Get information about the field.
   $field = content_fields($settings['field_name'], $node->type);
   $value = _content_rules_get_field_value($settings, $state);
-
   if (!empty($field) && is_array($value)) {
+    //check if the node's field has more than one value
+    if(is_array($node->$settings['field_name']) && count($node->$settings['field_name'])>1) {
+      foreach($node->$settings['field_name'] as $node_value) {
+        foreach( $value as $v ) {
+          if($node_value == $v) return TRUE;
+	}
+      }
+      return FALSE;
+    }
     return $node->$settings['field_name'] == $value;
   }
   else {