Wasn't there a post on FB using some kind of hidden sound file, which bypasses the "don't show images" protection? Edit: Yes, here we go: http://pandodaily.com

Wasn't there a post on FB using some kind of hidden sound file, which bypasses the "don't show images" protection? Edit: Yes, here we go: http://pandodaily.com/2012/03/06/facebook-knows-when-you-open-their-emails-how-creepy-silent-sounds/ http://pandodaily.com/2012/03/06/facebook-knows-when-you-ope...