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A number of complaints came to light recently from iPad Pro owners who were unhappy to discover that their expensive Apple tablets were bent. Apple responded to these complaints by saying that the iPad Pro's unibody design "meets or exceeds" all of its high standards. Now the company has gone further, publishing a support page explaining the manufacturer and testing process of the iPad Pro, and explaining that the way the tablet is made is the reason some people see a bend. Apple insists, however, that a bend should be within a tiny 400-micron tolerance. The support article is entitled iPad Pro unibody enclosure design, and on it, Apple explains "how the enclosure is made and tested". As we have discerned from complaints, it is the LTE version of the iPad Pro that is particularly susceptible to an unwanted bend, and Apple says -- as it has done before -- that this is because of the cooling down of materials used in the casing. Few people who have a bent iPad Pro will particularly care about why it is bent, being primarily concerned about the fact that it is bent. Apple insists that the "new iPad Pro models meet an even tighter specification for flatness than previous generations", and when it comes to the "flatness specification", there should be "no more than 400 microns of deviation across the length of any side", or -- as the company explains -- "less than the thickness of four sheets of paper". Follow the bent iPad Pro saga on OUR FORUM.