--- ../../temp/mediawiki-1.5beta4/includes/Sanitizer.php	2005-07-25 09:38:54.000000000 -0400
+++ Sanitizer.php	2005-12-03 10:53:21.000000000 -0500
@@ -568,6 +568,7 @@
 				'['    => '[',
 				"''"   => '''',
 				'ISBN' => 'ISBN',
+				'ISSN' => 'ISSN',
 				'RFC'  => 'RFC',
 				'PMID' => 'PMID',
 			) );