Hi all,

While playing with \startmathcases, I discovered some strange (maybe
wanted?) behaviour of \startmathcases and
\stopmathcases:

- The interline spacing in mathcases is different depending on whether the
mathcases are used in a mathalignment or a formula
  environment.
- Lucida OpenType math has some nice curly brace that is also used in cases
environments. However, if \startmathcases,
  \stopmathcases is used in some mathalignment environment and the cases
contain subscripts, the curly brace disappears
  and some "straight" brace is used instead.
- When using superscripts instead of subscripts, the curly brace reappears
but the cases look like not vertically centered in both
  formula and mathalignment environments.

I produced an example demonstrating the above observations. In my opinion,
the disappearing curly brace is worst of all of them since one
frequently has formulas both with and without subscripts on the same page
and different braces are quite easily spotted.

Tobias