### Please describe the problem.
When I try to add a box.com cloud repository with the encryption option selected, I get an error that says "internal server error". 

### What steps will reproduce the problem?
Anytime I try to set up a cloud repository with box.com (and presumably others, since this seems to be a problem with gpg (see log)) that is encrypted, I get this error.


### What version of git-annex are you using? On what operating system?
The operating system is Mac OS X 10.8.4, and the version of git-annex is 4.20130801-gc88bbc4.


### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

(encryption setup) gpg: /Users/adamliter/.gnupg/gpg.conf:233: invalid auto-key-locate list
30/Aug/2013:02:27:11 -0400 [Error#yesod-core] user error (gpg ["--quiet","--trust-model","always","--gen-random","--armor","1","512"] exited 2) @(yesod-core-1.1.8.3:Yesod.Internal.Core ./Yesod/Internal/Core.hs:550:5)

# End of transcript or log.
"""]]

[[!meta title="OSX bundled gpg does not work with gpg.conf created by MacGPG"]]