No, it works fine, a NetBSD 4.0 manpage is shown, I just used the FreeBSD website because I could not find anything like this on the NetBSD website.
chmod(2)
[EDIT]
Ok, this is not very obvious, for a minute I was confused to because it says "FreeBSD system managers manual", only after examining the FreeBSD version of the manpage was I sure this was in fact the NetBSD version.
I changed the site
http://netbsd.gw.com/cgi-bin/man-cgi