Ok, fixed the one with the continuing scanning - I think it's because the timed scanning timer is still running if you close the results window quickly after it's got something. I've made it stop when any window is opened now.

I may have also fixed the OpenGLES framerate thing. With the shutter closed at startup I see it start at ~8fps and drop down to 2.5fps or thereabouts. Is that what we're after?

I'm pushing a new version now.

Edit: I should also add that in my efficiency drive, I've paused the pipeline whenever a window is opened. We might need to revisit switching timers off when the app is backgrounded as I have a feeling they remain running.