I'm (re)tying to draw some attention to the $n\choose k$-issue with OpenType math fonts. 

I've made some test files:

http://dl.dropbox.com/u/151837/OpenType-Math.7z 

The best output is generated by LuaLaTeX (at least for Asana and Cambria). Would it be possible to correct the ConTeXt output as well?

Regards

Andreas