diff --git a/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php b/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
index d7df56ae..a8db5c08 100644
--- a/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
+++ b/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
@@ -42,7 +42,7 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
         $parser = new HTMLPurifier_StringHashParser();
         $this->build(
             $interchange,
-            new HTMLPurifier_StringHash( $parser->parseFile($dir . $file) )
+            new HTMLPurifier_StringHash( $parser->parseFile($file) )
         );
     }
 
diff --git a/plugins/phorum/config.default.php b/plugins/phorum/config.default.php
index 1b9e9381..e047c0b4 100644
--- a/plugins/phorum/config.default.php
+++ b/plugins/phorum/config.default.php
@@ -3,7 +3,7 @@
 if(!defined("PHORUM")) exit;
 
 // default HTML Purifier configuration settings
-$config->set('HTML', 'Allowed',
+$config->set('HTML.Allowed',
   // alphabetically sorted
 'a[href|title]
 abbr[title]
@@ -45,13 +45,13 @@ tt
 u
 ul
 var');
-$config->set('AutoFormat', 'AutoParagraph', true);
-$config->set('AutoFormat', 'Linkify', true);
-$config->set('HTML', 'Doctype', 'XHTML 1.0 Transitional');
-$config->set('Core', 'AggressivelyFixLt', true);
-$config->set('Core', 'Encoding', $GLOBALS['PHORUM']['DATA']['CHARSET']); // we'll change this eventually
+$config->set('AutoFormat.AutoParagraph', true);
+$config->set('AutoFormat.Linkify', true);
+$config->set('HTML.Doctype', 'XHTML 1.0 Transitional');
+$config->set('Core.AggressivelyFixLt', true);
+$config->set('Core.Encoding', $GLOBALS['PHORUM']['DATA']['CHARSET']); // we'll change this eventually
 if (strtolower($GLOBALS['PHORUM']['DATA']['CHARSET']) !== 'utf-8') {
-  $config->set('Core', 'EscapeNonASCIICharacters', true);
+  $config->set('Core.EscapeNonASCIICharacters', true);
 }
 
 // vim: et sw=4 sts=4