Problem with signing subkey - SHA256

[Charly Avital]

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Hash: SHA256

I have carried out checks, tests, and research, and still cannot solve
the following problem.

I run gpg 1.4.3 on three different Macs.
All three have the same pubrings and secrings.
All three have the same gpg.conf settings.

On two of them, I have no problem using an additional signing subkey to
clear-sign with SHA256.

On the third one, whenever I try to sign in-line, with digest-algo
SHA256 enabled in gpg.conf, I get the error message "DSA keys require a
160 bit hash...". The warning shows with three different MUAs (Eudora,
Mail.app, SeaMonkey 1.0.1).

SHA1 works fine.

Does it mean that in that computer, gpg does not recognize or accept the
signing subkey, and why?

The only difference with this third computer, is that it is running OS
10.3.9, while the two other run 10.4.6. I cannot believe this is the
reason why the signing subkey is not used.

The key is the same key in the three Macs.

The "third" computer's clock shows the correct time and date, therefore
there is no possibility of gpg not recognizing a subkey that might have
been generated "in the future". I even enabled --ignore-valid-from, but
no change.

Any ideas?
Thanks,
Charly


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