A couple new observations regarding the 1.01.10 FW release:
1. When locally streaming the video from a http port via a web browser (I use IE10) the new UI has now a talk button (a mic symbol), but when using https protocol with same IP address the talk button is missing. And more importantly, the MyDlink Advanced Settings interface always uses https, which means that you cannot establish two-way audio when using the Advanced Settings interface in remote connection -> the only possibility seems to be the talk button in the Live Video window, which to my experience seems to be rather unreliable and you also have to compromise the video resolution, etc.
2. When I upgraded to version 1.01.10 the already bad audio quality became even worse. Now I cannot practically use the audio at all, because it is cutting and clicking so much. Unfortunately the camera is in my holiday house more than 1000km away so I cannot easily switch back to the earlier FW version

One thing came to my mind however: when I upgraded the FW I didn't remove and reinstall the camera to the MyDlink cloud service by using the latest installation wizard and this might be one possible reason for this problem. I'm going to camera location next time in early October and then I will try to remove and reinstall the camera by using the latest wizard. Let's hope that it helps, otherwise I may have to switch back to the original 1.00.06 FW version, where the audio seems to work much better.