applyPageBreaks required its sentinel directly after the opening tag, but a
custom paragraph's serialized text starts with the FSZ/STY/PBX payloads, so
the break was silently dropped. It also minted PB# names, colliding with
applyParagraphBoxes' PB# — the importer then resolved both paragraphs to one
definition, painting the break paragraph with a stranger's box props. Now the
sentinel matches anywhere in the block and the pass mints PBK# instead.
Steffen Becker
7a8c552342