Hello!
The same consumer micro-update was released for business on friday, but due to some internal dependencies, it could not actually be applied to this business version.
I'm sorry for this, it was late and the usual release guy already left, so trying to release it fast, we overlooked that thing.
So the micro-update was re-released today under a new number 331.
You can find applied micro-updates in registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AVAST Software\Avast
MicroUpdates value
Petr