[NTG-context] math fractions

[Alan BRASLAU]

Hi,

Does anyone have a suggestion to generate a better result
for the symmetry specification:

\starttext
${2\over a}{2\over b}{2\over m}$
\stoptext

I tried:

\starttext
${2\over \vphantom{b}a}{2\over \vphantom{b}b}{2\over \vphantom{b}m}$
\stoptext

but this leaves too much vertical space - compare it to:

\starttext
${2\over \vphantom{b}a}{2\over b}{2\over \vphantom{b}m}$
\stoptext

Can this be a bug in ConTeXt math spacing?

Alan