William,
> If I may be permitted to make a remark from the sidelines:
>
> > I don't like this solution since it would still trigger save stack
> > overflow when there is an unclosed group at the end of the document.
> >
> > I quite prefer the usual warning about an open group at the end of
> > document over having a save stack capacity overflow triggered.
>
> Unclosed groups are likely obstacles for translation of LaTeX to
> formats like the usual tex4ht targets.
I don't think that David meant that an unclosed group should be ignored, but
that it is better to to get "document ended while group xyz open" than to bomb
with a stack overflow (for the same reason but harder to understand).
frank