What does "sig!3" mean?

[David Picon Alvarez]

> I'm using gpg 1.2.4. When I checked signatures on my own key, I'vefound
that one of my self-sig is marked as "sig!3". What does thismean? A valid v3
self-

Come down, it's not v3.

It's a signature with trust level 3. The standard allows for a "signature
force" to be encoded together with the signing of a key, which is supposed
to indicate how careful the verification of the UID vs the real world was. 3
means "I have verified carefully" or something along those lines.
HTH,
--David.