I have upgraded the garbage collector to v6.7. Hopefully this will be enough to complete the Darwin/x86 support. Juanjo -- Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1, Garching, D-85748, Germany Phone: +49 89 32905 345 Fax: +49 89 32905 336 http://www.mpq.mpg.de/Theorygroup/CIRAC/