First of all can I commend you for your hard work in producing a fine replacement for the stock app.

I have noticed one bug, although I don't know whether it should be called a bug.

When using the front camera with the phone physically in portrait mode, the image is upside down.

I think it's a function of the front camera. When you use the mirror app, the video is a mirror image. Try looking at some writing using the app, it's backwards. The new camera-ui front camera image is a true representation of the image