I just discovered that the generator test harness only processed the first generator type within each file. Oops.
Having fixed this, lots of test failures are now revealed. It looks like all versions of PonyMail have some failures. Most of them are related to the medium generator. The dkim failures are presumably due to recent changes in the Foal generator, and can be fixed by updating the test data. The other failures are more concerning, as it suggests there have been incompatible changes since the tests were generated.
