Gpg 2.1.10 - Invalid error with --encrypt-to

[Daniel Kahn Gillmor]

On Mon 2015-12-14 11:30:33 -0500, Patrick Brunschwig wrote:
> I'm using keybox, and it looks like my key is only once on the keyring.
> On a side remark, using the key ID instead the fingerprint works correctly.

This sounds similar to https://bugs.gnupg.org/gnupg/issue2187 as well,
actually.  Is it possible that the logic for stepping through the keydb
(whether keybox or keyring) has changed subtly, particularly when the
specification used is a fingerprint?

              --dkg