--- pollfield.module	2007-04-09 23:53:12.000000000 +0800
+++ pollfield.module	2008-02-21 18:39:38.000000000 +0800
@@ -800,8 +800,8 @@ function pollfield_form_alter($form_id, 
 }
 
 function pollfield_clear($node) {
-  $cid = 'content:'. $node->nid;
-  cache_clear_all($cid, 'cache', TRUE);
+  $cid = 'content:'. $node->nid .':'. $node->nid;
+  cache_clear_all($cid, 'cache_content', TRUE);
 }
 
 /**