I received this error on R 1.7.1 while trying to "Update packages from Bioconductor" "trying URL `http://www.bioconductor.org/bin/windows/contrib/1.7/widgetTools_1.0.1 3. zip' Error in download.file(url, destfile, method, mode = "wb") : cannot open: HTTP status was `404 Not Found'" Thanks, Dave.