A photo of a purported “iPad 3” rear housing has appeared online, and shows a number of small—but notable—changes between it and the iPad 2. According to Fix-iPhones’ RepairLabs, the new shell provides mounting holes for a smaller logic board, which the report suggests is to make more room for an even larger battery. Other differences in the two devices are said to include the camera hole and a different LCD mounting system. Notably, the report claims that the iPad 3 housing does not seem thicker than that of the iPad 3, but notes that it would be hard to prove without having both screens in place. Our sources have indicated that the iPad 3 will be very modestly thicker, a difference so small that it literally requires calipers to measure. [via AppleInsider]