Thank you for your clear email. You're completely right about email
programs confusing the issue of literal 8-bit or Unicode characters in
contexts like this.
It is definitely possible. There may be a bug in texinfo.tex in this
regard, or maybe it's the known deficiency. I'll experiment.
Meanwhile, there is one more test you can try: use the Texinfo sequence
of 7-bit ASCII characters:
@"U
instead of any literal character. With or without
@documentencoding, though it should not be necessary in that case.
because the bookmarks use Latin 1.
Strictly speaking, they don't use Latin 1 exactly, but the encoding that
is used (PDFDOCEncoding) is very close to Latin 1. (I admit I didn't
actually try to "diff" the encodings, but that's what Adobe says.) -k
