Bug 'resurrects' deleted image thumbnails in iOS 7 Photos app
Despite being discovered in iOS 5 last year, a possible caching bug in Apple's iOS 7 Photos app still allows thumbnails of deleted pictures to be "resurrected" by saving a transparent PNG file to the album.
The thumbnail restoration issue as applicable to the latest iOS 7.0.4 was spotted by AppleInsider reader Mike, while a quick check confirms that the small previews associated with deleted pictures do indeed reappear when a transparent image is saved to the Camera Roll. Full size pictures are not restored.
One of the first mentions of the Photos app bug appeared in Apple's Support Communities forum in early 2012, with the thread creator stating they were able to "resurrect" photos deleted some months prior by saving an image with a transparent background to their photo album.