9.0 PDF build broken

Mysteriously, commit 6b2a1445ec8a631060c4cbff3f172bf31d3379b9 has broken
the PDF build (openjade + pdfjadetex) in the 9.0 branch only. The error
is

[256.0.28
! pdfTeX error (ext4): \pdfendlink ended up in different nesting level than \pd
fstartlink.
\AtBegShi(at)Output ...ipout \box \AtBeginShipoutBox
\fi \fi
l.241723 ...char95{}stat\char95{}file('filename');

! ==> Fatal error occurred, no output PDF file produced!
Transcript written on postgres-A4.log.
make: *** [postgres-A4.pdf] Error 1

I have reproduced this on two different platforms, and it affects only
this branch. I guess this change might have caused the page boundaries
to shift in an unfortunate way. I seem to recall we have had similar
problems before. Does anyone remember?