In trying to install the latest context on my system, I installed texlive 2008, then the 2009.06.04 context, and rebuilt the formats. Using texlive 2008 solved my problems with the Palatino fonts not being found (compared to when I was using the latest context with texlive 2007). However, the following file fails on my laptop, and on the live Context (also 2009.06.04, texlive 2008): \newbox\phantombox \def\lowest#1{\setbox\phantombox=\vbox{\vphantom{$\displaystyle{#1}$}}} \def\support{\copy\phantombox} \starttext \startformula \lowest{Q} \underbrace{\support Q}_{dx} \stopformula \stoptext The error is: ! Use of \phantombox doesn't match its definition. \lowest #1->\setbox \phantombox = \vbox {\vphantom {$\displaystyle {#1}$}} l.8 \lowest{Q} Changing all uses of \phantombox to \phantomboxff fixes the problem, so maybe there's a name clash, but I couldn't find it in the context source code. -Sanjoy