[NTG-context] problems with "pagecomment"

Hi, Look at the following MWE: \setuppagecomment[state=start,location=right] %\definestartstop[Notes] %[before=\startpagecomment,after=\stoppagecomment] \def\startNotes{\startpagecomment} \def\stopNotes{\stoppagecomment} \starttext \input knuth \startpagecomment Hello \stoppagecomment \page \input tufte \startNotes Testing \stopNotes \stoptext This snippet does not compile. Page comments work when I use the commands \startpagecomment and \stoppagecomment directly (like in the first page), but when I invoke via macros (as in the second page), ConTeXt produces errors. What is wrong there? Thanks! ~MHB