That did the trick. But I had to search all over the forum to dig out the instructions on where to find macfilecache -- Spotlight didn't see it. And since this little trick seems to fix so many problems, perhaps those instructions should be included on the "Product Resources" pages under "General Tech Notes" or somesuch.
It would also be helpful to have a link to these forums under the "Support" tab. I spent a lot of time searching for an answer to this question under "Product Resources" and finally filed a ticket before getting the bright idea to search on Google using the symptom keywords and hit on these forums. I would have come here first if there had been an obvious link.