The big news in this release is that we have overhauled our implementation for showing your webcam feed overlaid on your screenshare. The new implementation uses a completely different approach before, and brings with it much better performance characteristics. You won't necessarily see a higher frame rate, but the load on the presenter's browser is much reduced. One user-visible change you might notice is that your webcam overlay is now in its natural shape, whereas before it was square, losing some of the video feed.
As always, email us at firstname.lastname@example.org with any feedback you may have!