[NTG-context] missing colon in lucida mkii

Hello, With the following example I get a dot instead of colon: \usetypescript[lucida][ec] \setupbodyfont[lucida] \starttext \startformula a := b \stopformula \stoptext The particular example in MKIV works fine ... ... except when it doesn't (\sqrt enters ifinite loop, but many other commands seem to be problematic as well). Mojca