3
Don´t know. Haven´t heard of this happing before.
There is a button to resynchronize the post count for users but so far one would have to do it on a per user basis.
(at least that button exists in 2.0.x series when you edit a user)
So you would need someone who is a little code savy to put the action that button does in a script.
(however i can´t do that)
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