There’s a similar quirk in the title and author attributes of \setupinteraction.
I’ve just got myself into a habit of always having a trailing comma in […,…] lists, and haven’t had any problems with that so far. Gareth ___________________________________________________________________________________ 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 : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________