Here's David's email follow up he sent to me:

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Thank you for the suggestions on my font problem.

I checked my fonts through the control panel and discovered I had 396
fonts. I scrolled to the end of my list and started to delete some (that
I didn't recognize) and realized this might be dumb--I should have a
backup of these.

To shorten the story, I deleted 6 of my fonts--I now have 390 fonts--and
it works OK! Unfortunately, I don't know which fonts I deleted. They may
have started with Z..

Thank you for your help!
David Crawford
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I'm glad it worked. The thanks go, actually, to David Frankenbach for this suggestion!