The Bioc 2.10 release image of RBGL has been modified in two significant ways 1) boost www.boost.org) C++ headers for graph algorithms are now derived from boost 1.49 2) RBGL C++ sources have been modified to compile cleanly with g++ 4.7 This has necessitated (at least temporary) removal of boost-based graph layout functions. The loss seems unimportant given the availability of Rgraphviz There has been a minor change to the behavior of incremental.components Similar changes are in place in the devel version. Users and developers who encounter difficulties with these changes should post details to the list.