Hi Jody,

Indeed, all the nodes are running the same version of Open MPI. Perhaps I was incorrect to describe the cluster as heterogeneous. In fact, all the nodes run the same operating system (Scientific Linux 5.2), it's only the hardware that's different and even then they're all i386 or i686. I'm also attaching the output of ompi_info --all as I've seen it's suggested in the mailing list instructions.