Originally posted by geomez My first guess is that the TC isn't relaying the info, which would mean a problem with the TC. But considering that it works with two cameras, I don't know what to think.
A similar problem frequently occurs with Tamron P/KA adapters from the 80's - they communicate aperture setting to and permit aperture selection from the body, but frequently only certain bodies in a users collection.
In that case the "fix" is to remove the very thin coating from the adapter by gently scraping the contacts themselve (or one of them - I can't remember which)
I would closely inspect the contacts on your TC to ensure nothing is interrupting electical connection between them and your non-working cameras.
As an owner of the K-01 I have noticed the K-mount is slightly different than on my other K-mount cameras - the width of the mount surface itself is a mm or two norrower than say my K10 or any of my film cameras. Maybe the contacts just barely line up on the two cameras working but are a hair off on the others.