--- showthread.php.old	2006-08-19 17:41:50.000000000 +0200
+++ showthread.php	2006-08-19 17:44:03.000000000 +0200
@@ -398,6 +398,8 @@
 		$posts = makepostbit($showpost);
 		eval("\$threadexbox = \"".$templates->get("showthread_threadedbox")."\";");
 		$plugins->run_hooks("showthread_threaded");
+		unset($threadedbits) ;
+		unset($tree) ;
 	} else { // Linear
 		// Do Multi Pages
 		$perpage = $mybb->settings['postsperpage'];