Hi, With this minimal exemple : %%% MWE \setupbodyfont[dejavu] \starttext 1. \m{E = m c^2} \par 2. \m{\bf E = m c^2} \par 3. {\bf \m{E = m c^2}} \par 4. \bold{\m{E = m c^2}} \par \stoptext %%% The letters disappear in the case 4. I had a look into the font manual and it seems to be related to the bold/mathbold difference but I do not understand these subtilities enough to understand what goes wrong. Anyway it seems that there is a bug here with dejavu because with lm the case 4. works (with the same rendering as 3.). Any ideas? -- Romain Diss