php appears to be adding junk characters to the end of everything it returns on a friend's site. I'm not an admin on the server but I'd like to give an informed complaint to get this fixed.

The site is http://daytoncodebreakers.org. You can see some junk at the end of every page on the site (what appear to be question marks with something else in the middle). I originally thought this was a wordpress issue, but check out http://daytoncodebreakers.org/whereisini.php (which is just a call to phpinfo), and http://daytoncodebreakers.org/hello.php (which is just 'Hello World').

I'm not sure if this is the most appropriate site, but I think this is a server config issue, so I'm posting it here (rather than stackoverflow or superuser). Feel free to move it if want.