In ver: 2007.01.12, a typescript like this works fine: \starttypescript[serif][minion][uc] \definefontsynonym [MinionRegular] ['Minion Pro:mapping=tex-text; +onum;'] [encoding=uc] \stoptypescript We get Minion Pro, mapping TeX markup to unicode characters and old- style numbers. This seems not to work in ver: 2007.07.24: the font can't be found (I'll put a bit of the log file at the end). However, everything is fine when the typescript is changed to read like this. \starttypescript[serif][minion][uc] \definefontsynonym [MinionRegular] ['Minion Pro'] [encoding=uc] \stoptypescript Here's what looks to me to be the relevant part of the log. systems : begin file article at line 1 (/Users/michaelgreen/Library/texmf/tex/context/article.tex (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-exa.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-syn.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-enc.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-siz.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-map.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-spe.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-akb.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-xtx.tex) (/Users/michaelgreen/Library/texmf/tex/context/myfonts.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-exa.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-syn.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-enc.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-siz.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-map.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-spe.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-akb.tex) (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-xtx.tex) (/Users/michaelgreen/Library/texmf/tex/context/myfonts.tex) ! Font \*minion12ptrmtfrm*:='"mapping=tex-text;+onum; at 12.0pt"' not loadable: installed font not found. ("myfonts.tex" is a file of typescripts for system fonts, made to match the those in the "creating your own typescripts section of the wiki page: http://wiki.contextgarden.net/Fonts_in_XeTeX). Perhaps the old functionality being replaced with something different. Thanks. Michael Green