revert this, it seems wrong

IkiWiki.pm

@@ -272,9 +272,7 @@ sub pagetitle ($) { #{{{
 sub titlepage ($) { #{{{
 	my $title=shift;
 	$title=~y/ /_/;
-	# Note: [:alnum:] is not used here, on purpose; unicode
-	# not allowed in urls.
-	$title=~s/([^-A-Za-z0-9_:+\/.])/"__".ord($1)."__"/eg;
+	$title=~s/([^-[:alnum:]_:+\/.])/"__".ord($1)."__"/eg;
 	return $title;
 } #}}}
 

debian/changelog

@@ -7,9 +7,6 @@ ikiwiki (1.16) UNRELEASED; urgency=low
   * Make aggregator save permalinks and author name to pages as metadata.
   * Add permalink and author support to meta plugin, affecting RSS feeds
     and blog pages.
-  * Change titlepage() to encode utf-8 alnum characters. This is necessary
-    to avoid UTF-8 creeping into filenames in urls. (There are still
-    some other ways that it can get in.)
   * Various CSS and formatting changes.
 
  -- Joey Hess <joeyh@debian.org>  Thu,  3 Aug 2006 18:45:36 -0400