mrEmpty questions

• iBeacon ranging and proximity is buggy
• 'No valid code signing identity found' error
• iOS5 Saving images to custom folder, ALAssetsLibrary fail
• AVCaptureSession fails when returning from background
• JQuery/Javascript and the use of && operators
• Detecting swipe gesture direction with Leap Motion
• iOS objc_msgSend crash, with no report or warning given

mrEmpty answers