A slow down of messages are observed when running with broker federation. Ex. pub --> B1 --> B2 --> B3 --> con Gordon has identified the issue as bridges are expecting acks and never get them. He has a fix for this (using no acks).
Fixed by qpid r652829.
cumin-0.1.2058-1.el5, qpidc-0.2.656926-1.el5, qpidd-0.2.656926-1.el5, and python-qpid-0.2.656025-12.el5 have been pushed to the staging repo for testing