When I try to nest lists like this:
\starttext
\startitemize[n]
\item bla
\item \startitemize[a]
\item bla $\displaystyle\int$
\item bla
\stopitemize
\stopitemize
\stoptext
I get this result, where the 2 and the a are not aligned:
This problem is caused by the large line $\displaystyle\int$.
I can somewhat work around this using some \vskip manually, but this is far from ideal.
The equivalent code in LaTeX works well.
I use ConText MkIV (2013.05.28) from the standalone installation.
\smash{$\displaystyle\int$}?\smash{...}doesn't really work because the integral symbol will overwrite the text on the lines above and below.