hmm, some problem with \ar@.
Maybe a collision with another macro of context.
I will investigate
--
luigi
----------------------------------------------------------------
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage :
http://www.pragma-ade.nl / http://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki :
http://contextgarden.net