Hi,
the following example shows space missing after the inequality sign:
\startformula
i = \startmathcases
\NC i, \NC \text{if} i = j, \NR
\NC j, \NC \text{if} i \neq j. \NR
\stopmathcases
\stopformula
An extra '\ ' after \neq solves this, but I think this shouldn't be necessary since $i \neq j$ does not require this fix.
Maarten-Jan