As of the very latest version of getBioC (1.2.23) there is a small API change that is unlikely to affect many users, but for those who it might affect ... Previously the version 'force' was defined as specifying if a binary package should be installed even if the R version it was built under did not match the current version. The default was TRUE, such that the user had to explicitly request this error checking. This option is now under the argument 'versForce', to align with the reposTools fucntions that getBioC is calling. Argument 'force' now also matches up with its reposTools equivalent and specifies whether or not a package is to be downloaded and installed if all of its dependencies are not available. The default behaviour is that if all of a package's dependencies are not available that the package itself is also not downloaded and installed. However, setting 'force=TRUE' will allow a package to be downloaded regardless. -Jeff