I can confirm and it will be fixed in the next version of the module but it will take a few days before I’m going to release it.
Wolfgang
Thanks, Wolfgang! Apparently, this problem started earlier than I
thought yesterday. I have set Euler as my preferred font for math,
and it used to work correctly in ConTeXt with the version timestamp,
"2013.06.10 22:51". I hadn't looked closely earlier, but when I
checked now, I discovered that this was not working even in the
2013.09.11 build of ConTeXt.
I'm quite happy with the 2013.06.10 build, so I'll continue to use
that for now.