Link: http://www.guardian.co.uk/world/deadlineusa/2009/aug/07/cat-download-child-pornography

Wait for it...courtesy of the Guardian newspaper:

A Florida man says his cat downloaded child pornography.
Police are charging Keith Griffin of Jensen Beach, Florida with 10 counts of possession of child pornography after finding more than 1,000 images on his personal computer.
Griffin told police he had been downloading music, and that his cat jumped on the keyboard when he left the room. He said "strange things" appeared on the computer when he returned.