How do I know that an application or TV show is not playing because it is geo-blocked, and not because of some other problem with the Boxee Box?

Some content providers block access to their content from outside their region, this has to do with distribution rights in different parts of the world.

The easiest way would be to pay a visit to the original content providers website, and try to play the media directly from there. If it works on their website, it should also work on the Boxee Box. If it won´t play on their website, then the Boxee Box will not play it either.