Mea culpa. Please accept my apologies... The problem was fixed on R-2.4.0 (final) and what I reported was on R-2.4.0 alpha.
Good job of Martin, by the way... The problem was fixed and I didn't notice (given that I was always using my work-around). benilton ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.