Thanks for the replies!
This feels like a bad dream... I've got the playlist zipped-up but, for the life of me, I don't see how to add an attachment to this message. The 'additional options' right below this message only list 4 check-boxes... nothing about attachments.
I've tried this in both IE and Firefox.
As an aside, I might also add that this is all happening in MC12, not MC13. If I've erred in posting this here, I'm sorry! I'm doing some final clean-up in 12 before moving over to 13. ALSO... I've imported the suspect tracks to MC13 on another PC here and it works fine there! But when I delete the tracks in my MC12 and re-import, nada.
With the time I've spent on this already, I'm almost to the point of permanently deleting the half-dozen albums and moving on!
If you could help me with this attaching-a-file thing, I'd be grateful. I'm blind.