A new version RcppArmadillo 0.3.6.2 (wrapping Conrad's Armadillo 3.6.2) arrived on CRAN this morning; Windows packages have also been built by now. A little more is at http://dirk.eddelbuettel.com/blog/2013/01/30#rcpparmadillo Cheers, Dirk -- Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com