diff -r 8baccbad4a55 -r a932ce8c4827 punbb/rewrite.php
--- a/punbb/rewrite.php	Sun Apr 06 00:35:38 2008 -0400
+++ b/punbb/rewrite.php	Sun Jun 15 01:42:31 2008 -0400
@@ -89,12 +89,12 @@
 // If we don't know what to rewrite to, we show a bad request messsage
 if (empty($rewritten_url))
 {
-	header('HTTP/1.x 404 Not Found');
+	header('HTTP/1.1 404 Not Found');
 
 	// Allow an extension to override the "Bad request" message with a custom 404 page
 	($hook = get_hook('re_page_not_found')) ? eval($hook) : null;
 
-	exit('Bad request');
+	die_friendly('Page not found', '<p>You have requested a forum URL that is invalid. Please press your browser\'s Back button to return to the page from whence you came, or return to the <a href="' . makeUrlNS('Special', 'Forum') . '">forum index</a>.</p>');
 }
 
 // We change $_SERVER['PHP_SELF'] so that it reflects the file we're actually loading