note 18676 added to function.header

I've been trying to use a 404 header in my script under certain conditions - and while the header is being sent (I double-checked with wget), It won't pull up my custom 404 error page. (even though the custom 404 works fine when typing in a malformed uri into the address bar) Has anyone tried this before? If so, are there any common pitfalls to be aware of? -- http://www.php.net/manual/en/function.header.php http://master.php.net/manage/user-notes.php?action=edit+18676 http://master.php.net/manage/user-notes.php?action=delete+18676 http://master.php.net/manage/user-notes.php?action=reject+18676