Hi Hans, It seems that the latest beta (version 2011.04.20 16:23) has a problem with arrow in math mode: I am not sure about it, but I think with the previous version this problem didn't exist. Here is a minimal example and its PDF result (please look at the \longrightarrow in the PDF): \starttext Let $E,F$ be two Banach spaces and consider a linear operator $L : E \longrightarrow F$. \stoptext Best regards: OK