Facebook said this week that photos that users have deleted are quickly removed from Facebook profiles and newsfeeds, but if you happened to have a link to the deleted pic, that link stayed live for some time. An update to the Facebook network, however, has fixed the problem, a spokesman for the social network said.

"As a result of work on our policies and infrastructure we have instituted a 'max-age' of 30 days for our content distribution network (CDN) links," the spokesman said. "However, in some cases the content will expire on the CDN much more quickly, based on a number of factors."

"To be clear, the photos stop being shown to other users on Facebook immediately when the photo is first deleted by the user," he continued. "The 30 day window only applies to the cached images on the CDN."