I received a recommendation from IBM to upgrade my Brocades to 7.4.2b to resolve an issue with IBM Blade Center midplanes causing CRC errors so, at least a month ago, they were making that recommendation. It turns out that release has an HA failover bug and my Brocade support recommended that I go back to 7.4.2a2. 7.4.2b has a fix for an NTP problem so I fixed that and then broke it again - nothing as serious as the HA failover problem though. We are running SVC 7.7.1.5 on 2145-SV1's.
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