[NTG-context] math in antp with MKIV

Hello, I'm trying to use \usetypescript[antykwa-poltawskiego] \setupbodyfont[antykwa-poltawskiego,10pt] \starttext \eTeX \stoptext but it fails miserably. An easy workaround is to use greek letters, but also the whole math is somewhat broken. In MKII the font would fall back on Latin Modern in case that there are no math glyphs, but ConTeXt MKIV complains about ! Math error: parameter \Umathquad\displaystyle is not set. system > tex > error on line 6 in file a.tex: Math error: parameter \Umathquad\displaystyle is not set ... What would be the remedy for that? (Tested with TeX Live 2011.) Mojca