extra dot on domain name gives different site

["Robin Wood" <dninja () gmail com>]

Hi
I've just been looking at a site and accidentally added an extra dot
to the end of the domain name, rather than getting the site I got a MS
small business server 2003 admin page.

e.g.
http://www.site.com gives the real site
http://www.site.com. gives the admin page

I assume that this is something to do with IIS not parsing the url
correctly so giving the default website rather than the vhost with
that address. Is this a known issue? I tried to google but couldn't
think what to google for!

Robin

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