The limma package has now forked into two series, one which depends on R 1.9.0 and one which depends on R 1.7.1-1.8.1. Limma versions 1.5.0 and higher depend on R 1.9.0 and are in the Bioconductor development package area. These versions are developmental and are not recommended to users. Limma versions 1.3.X etc continue to depend on R 1.7.1 - 1.8.1 and are being incremented at http://bioinf.wehi.edu.au/limma. Gordon