Thanks for the idea ... but no joy. Still no text coming out at all.
I tried rewriting my usetext using the _texmac PI. It did work where the %
escaped code worked before, but on landscape output, I'm still getting
nothing. (Not even unrotated text.)
For fun, though, I did learn you could hide this in someone's XML:
text to turn 90 degrees
Other numbers than 90 work, too.
Since the PI fails to work outside of a table but on a page that has been
rotated when composed on both Print Composer and Publishing Engine, I'm
going to open a call against it and see what support thinks.