Their web mail service was giving Horde errors (horde is a common web mail application, written principally in PHP). These error messages were spitting out the full, actual paths to various PHP include files, which points to very poor system configuration.

My guess is they've hired one of those geniuses that thinks he's a system administrator because he runs a Wamp server for his Warcraft guild's forum. Clearly, he can't handle this type of 'horde', either!