On 07/27/2010 02:21 PM, Julian Becker wrote:

I get the following errors:

systems : begin file test.tex at line 1
! Missing $$ inserted.
<to be read again>
                 \Ustopdisplaymath

This is a bug in luatex that will be fixed in the next beta,
it is not your fault. Until then, this definition somewhere
before \starttext should fix it:

 \def\Ustopdisplaymath{$$}

Best wishes,
Taco