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<DIV><FONT face=Arial size=2>Hello</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am typesetting (in plain XeTeX) a volume which
requires two elements to change in reaction to sideheadings, for which the
multiple marks of eplain seem the ideal solution. However, they *both*
have to use the trick described in the TeXbook (p. 260) of selecting either the
left or the right side of an \if statement:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">\expandafter
\iffalse \topmark\fi in the definition of the left headline, and</SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">\expandafter
\iftrue \botmark\fi in the definition of the right headline.</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">This
works fine with bare \mark (but NB not if I use the alternative \marks 0), but I
can't get it to work with \marks 1 - I get errors during compilation complaining
of a missing } even though I can't see anything wrong with the grouping, and the
error disappears if I use \mark instead of the \marks equivalent. Thus the
problem: I actually need two separate elements to switch in this
way.</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Here
is the relevant code from a version of the sideheading definition that does work
smoothly:</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">\marks
1{#2}\mark{\shelement \noexpand \else #3</SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">And
at the end of the sideheading definition (after the sideheading has been
typeset)</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN
style="mso-spacerun: yes"> </SPAN>\marks 1{#2}\mark{#3\noexpand \else
#3}</SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">But
what I really want to give is:</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">\marks
1{\instelement \noexpand \else #2}\mark{\shelement \noexpand \else
#3</SPAN></SPAN></SPAN></DIV></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">and
at the end of the sideheading definition:</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN
style="mso-spacerun: yes"> </SPAN>\marks 1{#2\else \#2}\mark{#3\noexpand
\else #3}</SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"></SPAN></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">In
the headline definitions I would then of course need:</SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"></SPAN></SPAN></SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"></SPAN></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Baskerville MT Pro'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">\expandafter
\iffalse \topmarks1\fi in the left headline, and</SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">\expandafter
\iftrue \botmarks1\fi in the right headline</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">But
when I make these changes I get the grouping error message described
above and it fails to compile (or if I tell it to go ahead and compile
quietly I get a rubbishy version of the headlines).</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">I've
tried carefully putting {} round the various elements that might be confusing
TeX, and I've tried both \marks1 and \marks 1 (with space) in case that made any
difference. I've also quickly tried a sample in plain TeX, though in fact
I do need XeTeX as I am using open type fonts for this job and must have full
Unicode. In plain TeX the same thing happens: simple \mark works but
the \marks equivalents don't.</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">As
it happens, nearly all the headings turn out correctly since one of the
elements changes less frequently, and if absolutely necessary I could intervene
manually with strategically placed \mark commands once the text has finally
settled down. But it would be much more satisfactory to have the system
working stably in the first place. Can anyone see what might be
wrong?</SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN></SPAN><FONT
face="Courier New"><FONT size=2>John</FONT></FONT></DIV>
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