We have all our Servers arround 100 migratated to RHEL 4.5, now with our Second Bigest System we must for Support Reason ( z-stream, extended support is not GA ! ) go for a newer Version we choice 4.6 because we don’t had the time to test all with 4.7.
But since we are live with the system and also a week befor we have a lot of Problems with this Version, it looks like the nightmare form 4.3 / 4.4 come back again. One Point is better, we have a Red Hat TAM now and he do the complete org things for us now. We also go in proactive Testing for 4.7 now, because there maybe a lot of bugs fixed now.
But all in one I’m not really happy with the QA from Red Hat, I also try to get in touch with the QA responsible from the Red Hat Cluster Suite.