But that is the point of the Beta, sure it will change, errors should be repaired and how else can they know of these errors if people don't test the beta.
They should not offer support if they are so unprepared to fulfill that obligation. It is Autodesk's obligation to spend time testing it to make sure that the proprietary software they offer is compatible with the latest OS. Considering the repercussion of the cost of down time caused by these types of programs..