New TeX-mode bug!

[Idris S Hamid <ishamid@attbi.com>]

With the latest beta, the following fails in TeX-mode (and therefore in Gamma 
as well). I've included TeX's error message as well.

Best wishes
Idris
=======================================

\starttext
\setupitemize[1][symbol=m] []
\setupitemize[2][symbol=KA][]
\setupitemize[3][symbol=KR][]

\startitemize
\item The {\em inkwell} corresponds to both {\em input} (e.g. editor,
interface,
and {encoding conventions}; the {\em ink container} per se) as well as {\em
output} (printing on paper and {\em interactive screen display}; the {\em
actual ink} on the page);

\item The {\em pen} corresponds to the typesetting engine. The {\em
sharpness}
of the ``pen'' is a function of the quality of the typesetting engine;

\item {\em Distinguishing the lines}, known today as {\em layout}, is 
governed
by the rules of {\em typography};

\item {\em Setting the letters closely}. Today this involves a {\em 
typeface},
with each character having an accompanying set of {\em metrics} and {\em
kernings} which govern the inter-letter and inter-word relationships;

\stopitemize
\stoptext
==========
! Undefined control sequence.
\HandleGroup ...->\bgroup \long \def \BeforeGroup
                                                  {\bgroup #1\bgroup 
\afterg...

\doifnextcharelse ...rtoken =#1\def \!!stringa {#2
                                                  }\def \!!stringb 
{#3}\futu...

\@@opitemizesymboollocal1 ...{\currentitemsymbol }
                                                  {\countervalue 
{\@@itemcou...

\dolistitem ...ue {\@@localitemsymbol \itemlevel }
                                                  }\headitemfalse 
\subitemfa...

\complexdoitemgroupitem ...norespaces \dolistitem
                                                  \ifpackeditems 
\stelwitrui...
<to be read again>
                   t
l.96 \item t
            est
?
-- 
Dr. Idris S Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80526