I was wrong, we need text width; I checked in some commits to use
Unicode::GCString if available, thanks to both of you for the help.
The downside is that there is one new string in PO files.
For me, it failed with:
po4a::text: Detection of two line titles failed at
Install the Unicode::GCString module!
(so "use if available" doesn't seem to work?)
I installed it from CPAN, and still get the same message.
I currently run po4a using PERLLIB pointing to my own copy pf po4a.
I tried copying the lib/ part of GCString into the same location, but
that didn't work either.
As you may recognize I'm not that used to Perl :-)