non-selfsigned-uid keys

[Public <Anonymous_Account>]

>From the gnupg-1.0.5 man page:

       --allow-non-selfsigned-uid
                 Allow the import of keys with user IDs which are
                 not self-signed, but have at  least  one  signa=AD
                 ture.  This only allows the import - key valida=AD
                 tion will fail and you have to check the  valid=AD
                 ity  of  the  key  my other means.  This hack is
                 needed for some German keys generated  with  pgp
                 2.6.3in.  You  should  really  avoid  using  it,
                 because OpenPGP has better mechanics to do sepa=AD
                 rate signing and encryption keys.

       --always-trust
                 Skip  key  validation  and assume that used keys
                 are always fully trusted.  You  won't  use  this
                 unless  you have installed some external valida=AD
                 tion scheme.

I have been sent such a key. After importing it into my pubring,
how can I _check the validity of the key by other means_ and force
gpg use it as an encryption key?

The --trusted key option doesn't seem to help:
	$ gpg -ea --trusted-key 0123456789876543 -r ReCiPiEnT
	gpg: ReCiPiEnT: skipped: unusable public key

The --always-trust option used to allow using this key (in previous
versions, eg. 1.04), but in 1.05 it does not:
	$ gpg -ea --always-trust -r ReCiPiEnT
	gpg: ReCiPiEnT: skipped: unusable public key



Thanks in advance for any and all replies,

- O.