There seems to be a path issue trying to get to the .gnupg directory when the
user's home directory is managed by Open Directory, at least on OS X (10.6.2).
The included file is a screen shot of the error. While the path is legitimate,
there is not sufficient information in the error as to why the User Agent cannot
create that socket. This does not happen on OS X when the user is local to the
machine. I suspect it has to do with the fact that it is dealing with a network
volume.