Revocation certificate still valid after changing subkeys?

[Adam Funk]

When I created my keypair I dutifully created and safely stored a
revocation certificate for it.

I recently added a new subkey and revoked the old subkey (as discussed
on this list).  I've also added and revoked a few UIDs since the key
was created.

Is there any reason to generate a new revocation certificate? Or does
it apply directly to the master key only?

Thanks,
Adam