Hmmm, very strange.  

As fare as characters for V3,  if you want to change her shape, you have to have morphs injected.  The character add ons that you buy have morph injections and they call on the head and body morph files that you have to have installed in order to change her shape and look to that of the character.

The only time you don't need the morphs is to apply a texture.  You can apply any texture you want without the morphs, but unfortunately for the characters you need them.

I don't have problems working with V3.

Have you tried going and redownloading V3 and the morph packages from Daz again? Maybe you got a corrupt file or something.

Also, are you using external runtimes? If so you need to put a COPY of the !DAZ folder in the library of the main poser runtime.

As a last resort you could reinstall Poser.  You won't lose your runtime or the files you have installed. Also make sure you have the Service Releases installed.

That's about all I can suggest.  Maybe others have some more options.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi