diff -urN cacti-0.8.7b.orig/include/plugins.php cacti-0.8.7b/include/plugins.php
--- cacti-0.8.7b.orig/include/plugins.php	2008-02-14 13:30:31.000000000 +0100
+++ cacti-0.8.7b/include/plugins.php	2008-02-14 13:30:58.000000000 +0100
@@ -33,7 +33,7 @@
 }
 
 if (isset($_SERVER['DOCUMENT_ROOT']) && isset($_SERVER['REMOTE_ADDR'])) {
-	$config['url_path'] = substr(__FILE__, strlen($_SERVER['DOCUMENT_ROOT']), strlen(__FILE__) - strlen($_SERVER['DOCUMENT_ROOT']) - strlen('include/plugins.php'));
+//	$config['url_path'] = substr(__FILE__, strlen($_SERVER['DOCUMENT_ROOT']), strlen(__FILE__) - strlen($_SERVER['DOCUMENT_ROOT']) - strlen('include/plugins.php'));
 	db_execute("REPLACE INTO settings (name, value) VALUES ('url_path', '" . $config['url_path'] . "')");
 } else {
 	$config['url_path'] = db_fetch_cell("SELECT value FROM settings WHERE name = 'url_path'");