@southcaligirl:
Dunno. Gotta check that out. I suppose it's because PayPal offers limited "buyer protection" on digital products to stop fraudsters who steal digital goods by buying them and then initiating chargebacks. Anyhow, I'll look into it for sure.
As for the typo, I'll fix that. It's not my copy -- it's Paul's

But I did fix quite a few typos before I uploaded it, so I guess I missed that one. Thanks!