Please describe exactly what you mean. I can't see from this report why it and
what does not work or leak information.

In the man page of gpg(1) it says:

--export-options parameters

export-minimal
    Export  the  smallest key possible. This removes all signatures except the

most recent self-signature on each user ID. [..]

If you actually do this to my key however, you will see that the resulting
output contains Nicolas' signature on my key, which is against what
"export-minimal" is supposed to do.

What you see are bogus subkey binding signatures. The clean function only
worked on user ID packets and their self signatures. A comment in the code
stated this. However, I see no reason why we should not remove those bogus
signatures.
Commit 3563237 does this now.

Thanks.