Thanks, AppleMan1958. Never would have tried the Share menu, since Apple typically puts all Save, Export, etc. commands in the File dropdown. Guess twenty-eight years of using Apples/Macs has me set in my ways. 😉
From your post:
"Finalize Project will create a Media Browser copy for all available sizes. If you have already finalized, it will not do anything unless you do further edits. In this case, your Media Browser copies are deleted and you can Finalize or Share again."
That's the weird part---no Media Browser copies were made, in any size. It's as if the File > Finalize command is dead.
Very odd...but so's the fact the Help files say I should see a Clip Trimmer option in the Project browser > Action menu. No such item in the Action drop down. Had someone else here in the office try to locate it, and sure 'nuff, it just isn't there (current version, iMovie 11).
Off to mark this solved. Thanks again!