Comment 2 for bug 333057

This bug is reported and a patch supplied in Debian Bug report logs - #509415
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=509415

Duplicity backup depends on this module as well. When the correct shift is made, the error is 2, File Not Found, and refers to the non-existence of the ~/.gnupg directory and its necessary files. The workaround for this problem is to run gpg from the command line and let it create the files it needs, then GnuPGInterface will work correctly.