On a 3GS...
Take a photo with Camera app, then (from within the Camera app), touch the bottom left to get access to Camera Roll. Click Edit, then click Cancel.
Screen goes blank. Swipe to go to a previous pic. Press bottom left to go back to camera. Blank screen. Press Home button to exit Camera app. Start Camera app and still a blank screen.
This is intermittent and not always reproducible.
Take a photo with Camera app, then (from within the Camera app), touch the bottom left to get access to Camera Roll. Click Edit, then click Cancel.
Screen goes blank. Swipe to go to a previous pic. Press bottom left to go back to camera. Blank screen. Press Home button to exit Camera app. Start Camera app and still a blank screen.
This is intermittent and not always reproducible.