404 Header

I wish PunBB 1.3 would send Header 404 to the clients if the page isn't found. I've migratet from PhpBB, and links like this one:

http://www.info-mob.com/forum/profile.p … e&u=27

are still in the search engines. PunBB says there is an error, but it sends "200 OK" header to the browser/bot. This way search engines keep track of many of my pages witch acctually aren't there anymore. Sending 404 error heading would solve this little problem...

I believe there are meni other pages like this one!