I've updated to IPN 1.3. The Help File for CCGV(trad) integration that comes with IPN 1.3 is the same file that's distributed with CCGV(trad) itself and I've done that, too. The same problem is still happening.
I guess if no one else is having (or has had) this problem, I've got something else going on. It's not a deal-breaker, as the total is correct in PayPal, but the itemization is wrong which means questions from the customer. The site is low volume, so I guess we can deal with it.
Thanks for trying, even if I seem to be being told to RTFM, which is what I've already done.