Dear Khaled, dear Hans, I noticed that when using xits fonts the command \widehat is ignored (though \hat gives the expected result). Minimal example %%% begin example \setupbodyfont[xits,11pt] \starttext By definition we set ${\widehat \phi}(\xi) := {\cal F}(\phi)(\xi)$ that is \startformula {\hat \phi}(\xi) = \widehat{\phi}(\xi) = {\widehat \phi}(\xi) := {\cal F}(\phi)(\xi) := (2\pi)^{-N/2}\int_{{\Bbb R}^N}{\rm e}^{-{\rm i}\xi\cdot x}\phi(x) dx. \stopformula \stoptext %%% end example This bug report concerns mkiv version ConTeXt ver: 2012.09.16 23:18 MKIV fmt: 2012.9.17. However in older versions the same problem exists. I don't know whether this is a bug in mkiv or in xits fonts. Best regards: OK