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Dear list, I have the following sample: \definefontfeature[default][default][protrusion=quality] \definefontfeature[opbd][protrusion=yes,opbd=yes] \setupalign[hanging] \showframe \starttext \definedfont[LinLibertine_R.otf*default at 450pt] %~ \definedfont[LinLibertine_R.otf*opbd at 450pt] W \stoptext I cannot compile it with latest beta (from 2018.08.30 18:41). I get a Lua error. Using the same beta, opbd don’t seem to work anymore. I mean, opbd worked with ConTeXt about a year: \showframe \definefontfeature[default][default][protrusion=quality, opbd=yes] \definefontfamily[mainface][rm][TestOPBD] \setupbodyfont[mainface, 60pt] \setupalign[hanging] \starttext Ἠ\\Ἠ\\Ἦ\\ἯἯ \stoptext I mean, I compile it, but lfbd isn’t used at all (I attach the test font I use). Have I hit a bug or am I missing something? Many thanks for your help, Pablo -- http://www.ousia.tk