It contains a mountain of bug fixes and some new features. One last feature that isn't in yet is Mellanox's new MTL; we'll pick that up in the next RC (because it's very standalone / doesn't affect anything else and I wanted to get this RC out the door. Finally).
http://www.open-mpi.org/software/ompi/v1.5/ -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/