If someone who understands this better than I do agrees with me that
this is a bug, I'll be happy to write up a real bug report, especially
if you tell me what feature of lilypond to report the bug against. I've
put a lot of effort into writing up bugs recently (both here and on
emacs24) that got categorized as "not a bug" when the real category is
"too hard to fix". I assume there's a reason why stz went away, and
maybe it's because what stanza does with stanza numbers is really hard
to do on the second system. Although I don't see why it should be.