Hi Hans and others! I don't know if this is a problem with the font itself or if it is ConTeXt. In any case, the test file below gives strange output (attached). In particular the space/kerning after $f$ seems to be off. Ulrike Fischer reminded me in the StackExchange chat that not so long time ago there was some similar issue with \mathcal P discussed on this list. Is it the same problem? (The input $f \tracinglostchars=0 \Uchar"EEEFF$) indeed makes it look better between the $f$ and the parenthesis.) /Mikael %%% \setupbodyfont[bonum] \starttext \startTEXpage[offset=3bp] (Look at this $f$) and this $f$? (see also $k$?, $x$? and $z$?) There might be more problems (like between $t$ and the parenthesis in $e^t$) is too small. The space between $dx$ and the bar is too small: \startformula \Bigl|\int_0^\pi\sin x\,dx\Bigr|, \stopformula Look at the $f$ and the bar: \startformula \Bigl|\int f\Bigr| \stopformula The $x$ seems to be outside the fraction: \startformula \frac{a^2}{1-x} \stopformula We add another one (in fact two) including $f$: \startformula f\Bigl(\frac{a+b}{2}\Bigr) \stopformula Also look at $\xi_0$ and $\xi_1$, the subscripts are too far away from $\xi$. Compare with $f_0$ and $f_1$, $g_0$ and $g_1$. With $\delta_f$ and $\delta_g$, I think it looks like the space is too big, in particular between $\delta$ and $f$, but maybe that is a matter of taste. \stopTEXpage \stoptext %%%