Has anyone had a problem with v4.2 head twisting around almost 90 degrees after injecting a pose from the library? The eyes morphs don't work properly either as they're stuck open and I can't get them to close. v4 base works ok but not 4.2.

You did reinitialized and updated V4.2 when you installed, right?

yes

its something that has only began to happen recently.

Does it occur with all poses or just specific poses?  I would suggest closing Poser and reopening, hopefully it might reset Vicky.  And are you using external binary morph targets in your General Preferences?

Edit: The only afterthought, you might have a corrupted Poser.ini which can be rebuilt after deleting or relocating the old one.  One thing at a time.

I'm using external morph targets...Would it help if I unchecked that?

The creation of pmd's have been known to cause problems with morphs and poses, and many users shut down this feature.  I would try unchecking the box, save your preferences, reboot Poser and load a fresh V4.  Then try your poses.

What you're describing in known as the Linda Blair effect...

LOL!!!

Does said head turn back around, from the other direction, pea soup going everywhere, while it makes insulting comments about your mother performing certain acts in hell?

HAHA! Thanks for posting that- when I saw the thread title this was what first came to mind!

Note: One of my best friends in college was first cousins with Linda Blair-who was younger. Evidently the exorcism worked-because she lost the neck mobility.:-)

Quote - Only with feet and with poses not intended for the character. The feet twist well beyond 180.

What you're describing in known as the Linda Blair effect...