See the following example, I get unknown references in the log and
question marks in the output. I'm working on a project that I should
finnish soon, so if fixing this will take some time, please let me know.

\starttext
\chapter[1]{One}
\in[2]: \about[2]

\chapter[2]{Two}
\in[1]: \about[1].
\stoptext


Regards,
 Khaled


-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer