Hans, I reported this issue some time ago. The new fontloader crashed when the opbd feature was invoked. That issue was fixed, but opbd is still not working, as shown in the following sample: \definefontfeature[default][default][protrusion=quality, opbd=yes] \definefontfamily[mainface][rm][Linux Libertine O] \setupbodyfont[mainface, 300pt] \setuppagenumbering[location=] \setupalign[hanging] \showframe \starttext W \stoptext Could you fix the opbd feature? Many thanks for your help, Pablo -- http://www.ousia.tk