With 3D Photo, the two images with a disparity between the left and right eyes are merged into a single image and recorded as a Multi Picture Format file.

ENGADGET: Olympus introduces Stylus SP-820UZ, SP-720UZ cameras and SZ-14 binocular bundle

Yet when Fortress found out that the picture FORBES had on file featured only four of the Fortress executives, it quickly found a replacement.

FORBES: A Quick Buck

They'd come to file past a picture of Chavez propped amid flowers and flanked by a military honour-guard.

BBC: Cubans mourn 'comrade Chavez' as one of their own

The picture shows the band members walking in single file on a zebra crossing in north London's Abbey Road.

BBC: Beatles' Abbey Road cover in Calcutta traffic campaign

The Motion Picture Association of America is already working on its own economic study of the harmful effects of file sharing, to be completed this autumn.

ECONOMIST: The good and bad of internet file-sharing