Shortly after it had announced the Xperia Z5 and its two siblings, even before the device could land in anyone's hands, Sony made some changes to its guidance for the water and dust proof performance of its devices. And it made the changes rather silently, almost secretly. Whereas it boasted about the underwater feats that its devices could achieve, it has now filled the page with warnings, even discouraging taking pictures while submerged in water. Now the Japanese OEM is explaining why it made those changes. Well, somewhat explaining.