Hi, I'm experiencing problems with the latest (today's) beta, and I suspect they are caused by the "bold math" change. The error is: (/mnt/shared/context/tex/texmf-context/tex/context/base/type-otf.mkiv){/mnt/shared/context/tex/texmf/fonts/map/dvips/lm/lm-math.map}{/mnt/shared/context/tex/texmf/fonts/map/dvips/lm/lm-rm.map}{/mnt/shared/context/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map} ! LuaTeX error ...ontext/tex/texmf-context/tex/context/base/l-file.lua:34: bad argument #1 to 'match' (string expected, got nil). and then <to be read again> \scriptscriptfont \dosetboldmathfamilyindeed ...#3\scriptscriptfont #1\font \let \currentmaths... \dosetboldmathfamily ...oldmathfamilyindeed #1#2#3 \fi \else \dosetboldmathfa... \completeboldmathstrategyyes ...bfam \c!mb \mrfam \textfont \mbfamrl \textfo... \applycompleteboldmathstrategy ...mathstrategyyes \fi \else \completeboldmat... <inserted text> ...\applycompleteboldmathstrategy \edef \currentmathfontmr {... ... l.241 used as a fallback}} Not sure where to look though, I have defined a proper math font in my typescript. Thomas