I'm getting the error on IE6, but I was getting it before on 5.5. I also run Netscape (donno what verson) and opera, and they both do it too.
The URL I get it at is <A target="_blank" HREF=http://www.mmogzone.com/wwwthreads/newuser.php>http://www.mmogzone.com/wwwthreads/newuser.php</A> and you can check the PHP version, etc, at <A target="_blank" HREF=http://www.mmogzone.com/test.php>http://www.mmogzone.com/test.php</A>.
I'm not sure what else to tell you.