[NTG-context] bug in latest beta?

Hans, after upgrading to beta from 2015.05.13 23:52, the compilation of most of my documents crashes. I get two different errors depending on the document: error: .../ctxbeta/tex/texmf-context/tex/context/base/typo-itc.lua:148: attempt to call global 'setfield' (a nil value) error: .../ctxbeta/tex/texmf-context/tex/context/base/typo-itc.lua:159: attempt to call global 'setfield' (a nil value) I cannot provide a minimal sample now. I wonder whether the error itself might be enough to fix the issue. Many thanks for your help, Pablo -- http://www.ousia.tk