Sorry, I've been too overrun with off-topic problems to reply to your last message in a timely manner. I did download and build version 0.23 the same day you announced it. It again failed test 23 for me. I see tonight that the CPAN Tests results show 49 fails and 12 passes for this version. This time I did actually look at all the test messages and I discovered that several included more detail than I was getting from my own automated tests.
Here's the relevant part snipped from one of those messages: