If you’re still running OpsMgr 2007 SP1 you definitely need to apply the rollup package has been released yesterday (finally): Update Rollup for Operations Manager 2007 Service Pack 1 (KB971541).
It should set an end to the patching blues I complained so many times about.
Hopefully a similar rollup will be delivered for R2 sooner than later from what I know. Some issues fixed in SP1 are still present in R2.
In the and my advice is if you’re still on SP1 it is still a good idea to move to R2.
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