Bug#806445:

[Kjö Hansi Glaz]

> So, Kjö, Beren and Sebastian: can one of you please confirm whether
> you've experienced one of the problems this bug report is about on
> Debian Jessie?

0. "Add subkey to ..."
   * 8.2: General Error
   * stretch: General Error
   * stretch + patch: General Error

1. check the checkbox "I trust signatures from 'USER' on others key"
   * 8.2: OK
   * stretch: General Error
   * stretch + patch: OK

2. change the value of the field "You Trust The Owner:"
   * 8.2: OK
   * stretch: General Error
   * stretch + patch: OK

3. "Sign This Key" (whatever option I choose)
   * 8.2: General Error
   * stretch: General Error
   * stretch + patch: General Error

So you're right, the patch pointed on message #10 does not solve the
issue this bug was initially about, nor the error while signing key.
However, the patch solves the regressions introduced by Debian Stretch.

> If yes, what version of libgpgme11 do you
> have installed.

Debian 8.2 I have libgpgme11 1.5.1-6.

I'm trying to find if upstream has patches that solves the subkey and
signing issues.