We are now being recommended to upgrade all applicable switches to 5.0.3/5.0.3a (from their current 4.4.0f) as it should solve all our outstanding problems (I certainly won't be doing them all in one go though!).
v5.1.0 is not intentend and not work on the 12000 Director. First the next release v5.1.x can be used for the 12000.
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