diff -urN ../htmllint.orig/tagslist.cgi ./tagslist.cgi
--- ../htmllint.orig/tagslist.cgi	Thu Sep 13 13:00:00 2012
+++ ./tagslist.cgi	Fri Sep 28 16:00:00 2012
@@ -177,7 +177,7 @@
   &PrintHTTPHeader;
 } elsif ($tag) {
   $tag = "\U$tag";
-  &SelectTAGSLIST($tag);
+  &SelectTAGSLIST('_tag_'.$tag);   # (HTMLVersionの)HTML+と(タグの)<htmlplus>のキャッシュファイル名重複を避けるため
   &PrintHTTPHeader unless $TAGSLIST;
   &PrintHTMLHeader("All of ${tag}'s Attributes");
   &Jprint(qq|<h2>&lt;\L$tag&gt; |, 'の属性一覧', qq|</H2>\n|, $AttrHeader,
@@ -300,7 +300,7 @@
   &PrintHTMLFooter;
   &CloseTAGSLIST;
 } else {
-  &SelectTAGSLIST($rule);
+  &SelectTAGSLIST('_rule_'.$rule); # (HTMLVersionの)HTML+と(タグの)<htmlplus>のキャッシュファイル名重複を避けるため
   require $rule.'.rul';
   $html = ${$doctypes{$rule}}{'guide'};
   $xhtml = ${$doctypes{$rule}}{'version'} >= 5.0;