The following code works in MKII; but in MKIV, I get the header text on the
page *before* the page with the title. How can I fix this?

Alan
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\setupheader[state=high]

\setuppagenumbering[alternative=doublesided]
\setuppagenumbering[location=,]

\setuphead[title][page=yes]

\definehead[BookTitle][title]
\setupsectionblock[BookTitle][number=no,page=yes]
 \setuphead[BookTitle][before={\noindent\textrule},style=rm]

\setuphead[BookTitle][header=high]
 \setupheadertexts[text]
[\cap{A.\ U.\ Thor}]
 [\pagenumber]
[\pagenumber]
[\em{The Journal}]


\starttext

\dorecurse{6}{\input{knuth}}
\page[makeup]

\BookTitle{{\em An Indubitably Important Book} by A.\ U.\ Thor}

\dorecurse{10}{\input{knuth}}

\page[makeup]

\stoptext