Problems with columnsets and \startbackground \stopbackground

[Olaf Mersmann <olafm@kimberly.tako.de>]

Hi list,

I have some wierd interactions between a columnset and \start- /
\stopbackground.

---- cut here ----
\setuppapersize      [A4, landscape]
                     [A4, landscape]
\setupcolors         [state=start]
\setupbackground     [background=screen, 
                      frame=on,
                      frameoffset=2pt,
                      backgroundoffset=2pt]
\setuphead           [section]
                     [style={\ss\bf},
                      before={\startbackground},
                      after={\stopbackground}]

\definecolumnset     [foo] [n=2]
\starttext
\startcolumnset[foo]
\subject{ABC} 
\input tufte
\input knuth

One more line and {\em BOOM} - it's broken.\crlf
Here we go. 3 2 1 -- page break!

\subject{DEF} 
\input knuth
\stopcolumnset
\stoptext
---- cut here ----

The second \subject{} causes a page break instead of wrapping into the
second column. Is this a bug, or am I missing something when using
\start- / \stopbackground?

Would this go away if I where to use a MP graphic for the background?

Thanks for any help.

-- Olaf