That page has it's og:url set to http://www.trainlearncreate.com/facebook.html
Mediatemple (DV). http://www.site500.com/facebook.html
That page has it's og:url set to http://site500.com/facebook.html
Currently the second page is working for me in the debug tool as well - but if you maybe had a non-www-to-www-redirect in place, this would lead to a redirect circle, since Facebook tries to retrieve the OG info from the address given as og:url.