1 Answer

   Some iPhone owners may have noticed that photos taken with the Apple iOS device and stored to the camera roll appear rotated when viewed on a Windows computer. The photos appear fine on the iPhone, however after being transferred to Windows they are upside down, or turned sideways.

It appears that something in the photo metadata is being written to tell Windows the photo is oriented in one direction. Now that iOS 5 allows users to snap photos with the volume buttons, many people hold the iPhone with the volume buttons up so they act as a shutter release.

Unfortunately, this is the direction in which the iPhone takes upside down photos. To solve the problem, the iPhone must be turned with the volume buttons facing down. Until Apple comes up with a fix, Windows users will have to adjust their photo rotation after the fact or keep the iPhone in this position. Turning rotation lock on or off does not fix the problem.

http://www.iphonefaq.org/archives/971808

http://reviews.cnet.com/8301-19512_7-57382911-233/why-does-my-iphone-take-upside-down-photos/