For the others who've had similar problems, thought I'd let you know, all you need to do is "downgrade" your
rpm.rpm package. I had installed rpm-4.0. Looking on rpmfind.net, rpm-3.0.5-9.6x is the latest I can find for
i-386 now. Looks like the 4.0 version is available for power-pc? You will probably need to use the --force and
--nodeps options. It will fight you a bit, but your database will be back, and the stupid "major number >3" issue
will be fixed. Just to be sure, I did a --rebuilddb afterward too, but I don't think it really did much...