I have just uploaded to CRAN the latest build of R 1.6.1 for MacOS/MacOSX (the Carbon version) along with the contributed packages and the Bioconductor_1.0 bundle. This will propagate on CRAN starting from midnight in a couple of days. There are no particular Mac changes in this release. All other changes in 1.6.1 apply to this Mac release. Stefano