Same as above in English:
In a multi-user environment (i.e. terminal server of Windows 2008 Server) the boxcryptor drive of a user will seen from all other Users that are logged in on the terminal server. For content that I want crypted is that not a very good idea.
Tested with boxcryptor 1.1 and 18.104.22.168
Another good idea (imho) is, that the boxcrypter installation are only will be installed for the installing user, not for "All user".