thanks for your concern...
I've already found the workaround-- and that is saving as a PSD, which I described pretty clearly above.
The PDF saving capability is not working though. Incidentally, have you not read the whole above thread?... I mean the problem is right there from many people before me.
Do you actually work at Adobe Photoshop? How are you an "expert"?
The issue is, I'll repeat:
I save as PDF. either by renaming or overwriting existing file.
I hit save.
The window disappears. Usually there is a small pause where the pointer turns into a wheel. That doesn't happen. There is no pause. The dialogue window simply closes after I save. And nothing is done.
The file is not saved.
I can save in other formats though.
I have a lot of other work to get to now. So I don't have time to pursue this anymore.