Dirk Eddelbuettel <edd at debian.org> wrote: [...] > Which R version? This changed in 2.2.0, I think. Do you still use 2.1.1 ? Using 2.2.0 here: R> version _ platform i486-pc-linux-gnu arch i486 os linux-gnu system i486, linux-gnu status major 2 minor 2.0 year 2005 month 10 day 06 svn rev 35749 language R -- Sebastian P. Luque