Oh dear! Where does that leave people who bought the export?
This is clearly stated in the blogpost :
"We know that some of you have, like us, invested heavily in targeting Flash. We will do all we can to support you. We will keep the current Flash deployment feature set functioning throughout the Unity 4.x cycle, and will include bug fixes made in upcoming Unity 4.x iterations. We do not plan, however, to make further significant investments in deployment to the platform.
We encourage license holders who have questions or concerns about Flash deployment to contact us directly at support@unity3d.com or contact their account manager."
Thanks sama.van, closing this topic to avoid dupes.