Hi,

I stumbled upon this (see the attached file for the result):

%%% Test file

\setupbodyfont[10pt]

\starttext

\startTEXpage[offset=10pt]

\type{\tbinom{n}{k}}: $\tbinom{n}{k}$, (does not look good, the vertical space between $n$ and $k$ is too big) \par

\type{\binom{n}{k}}: $\binom{n}{k}$ (looks fine to me)\par

\type{\dbinom{n}{k}}: $\dbinom{n}{k}$ (does not look good, too big parenthesis, even for displayed formulas).\par

\stopTEXpage

\stoptext

%%% End of test file

I think something should be changed to get the binomial coefficients to look better. In particular I am concerned about the rather big parenthesis in displaystyle (and not so much about the vertical space issue in \tbinom).

/Mikael

PS The result looked better if I used the lucida fonts, if that helps.