Problem with backgrounds and page breaks

[Matthias Weber <matweber@indiana.edu>]

Hello,

when using text background colors in enumerations, I run into a problem
whenever the enumeration appears on the beginning of a page: Then,
the background extends over some part (sometimes all) of the previous 
page.

I can manually correct this by putting a \break just before the 
enumeration, but this
is a little tedious, as I am frequently reformatting the document. 
Below is a small example.

Thanks for any help!

(TeXExec 5.2.3 , ConTeXt  ver: 2004.11.23  fmt: 2004.12.16  int: 
english  mes: english)

Matthias



%ConText
\mainlanguage		[en]


\setupcolors[state=start]
\setupcolor[rgb]

% Exercises and Activities

\definecolor[exc] [r=.94,g=.9,b=.9]

\definetextbackground
[exbackground]
[backgroundcolor=exc,
corner=round,
before=\blank,
after=\blank,
leftoffset=5pt,
rightoffset=5pt,
topoffset=5pt,
bottomoffset=5pt,
frame=on,
framecolor=darkgreen,
location=paragraph,
color=darkgreen]



\defineenumeration
[exercise]
[before={\starttextbackground[exbackground]},
after={\stoptextbackground},
way=bysection,
text=Exercise,
start=1,
location=hanging,
letter=rm]


\setuppapersize[S6][S6]

\setupbodyfont[12pt]

\starttext


\input tufte \input tufte

new line

new line

new line


\startexercise
Please explain how to get rid of the additional framed stuff on page 1.
\stopexercise

\input tufte

\stoptext