Index: extensions/Postcomment/Postcomment.php
===================================================================
--- extensions/Postcomment/Postcomment.php  (revision 114024)
+++ extensions/Postcomment/Postcomment.php  (working copy)
@@ -37,7 +37,7 @@
    function execute( $par ) {
        global $wgUser, $wgOut, $wgLang, $wgMemc, $wgDBname;
        global $wgRequest, $wgSitename, $wgLanguageCode;
-       global $wgFilterCallback, $wgWhitelistEdit;
+       global $wgWhitelistEdit;

        //echo "topic: " . $wgRequest->getVal("topic_name") . "<br />";
        //echo "title: " . $wgRequest->getVal("title") . "<br />";
@@ -107,7 +107,8 @@
        $text .= "\n\n$formattedComment\n\n";

        $tmp = "";
-       if ( $wgFilterCallback && $wgFilterCallback( $t, $text, $tmp) ) {
+       $errorText = '';
+       if ( !wfRunHooks( 'EditFilter', array( new FakeEditPage( $t ), $text, $tmp, &$errorText ) ) {
            # Error messages or other handling should be performed by the filter function
            return;
        }