Readers who tap on it are taken to GetUp's website, where they can view the video and make a donation to "help thwart Rupert Murdoch". GetUp's anti-Rupert Murdoch ad (far right) appears on the mobile site of news.com.au, which is owned by the media mogul. On Thursday, the ad ran accidentally but prominently on the mobile phone websites of Murdoch's News Corp newspapers during lunch-time - the peak period for online browsing - before being removed. In an email obtained by Fairfax Media, a senior News Corp executive wrote to three colleagues at 5.19pm with the subject heading "URGENT". It read: "We are running the Get-Up anti-News ads - can we pull them VASAP? (sic)". It also contained a link to Fairfax's initial online report about the blunder.

News Corp declined to comment. Fairfax Media's election coverage The ad is the same one that was banned by Channels Seven, Nine and Ten. GetUp has accused the networks of censorship to placate Murdoch and News Corp. The ad accuses the Courier Mail and Daily Telegraph of "using their front pages to run a political campaign". An actor then tells viewers: "[The papers'] owners, US billionaire Rupert Murdoch, has an agenda to get rid our our current PM - fair enough, we all have an opinion. But political bias presented as news is misleading crap."

At this point, he uses a copy of the Courier Mail to scrape up a pile of dog faeces. "Don't let the crap decide your vote," the actor says. "Stand up for what you want. Tell Rupert, 'We'll choose our own government'." GetUp's national director Sam McLean was surprised to learn the ad had been showing on News Corp's websites. "Let's hope they don't do a Channel Nine and pull it down," he said on Thursday, before News Corp removed it. Earlier this week, the Nine Network cancelled the ad after screening it over four days in Brisbane, while Seven and Ten rejected it outright.

"It just goes to show that good yarns have a way of getting out there, even when some people don't want them to," Mr McLean said. "The transition from print to digital appears a little more difficult for News Corp than some might have expected." Social media users were also surprised. "Oops! Someone at News Corp wont have a job tomorrow," tweeted @benwilling. "Thank you, Rupert, for being too old to understand how the Internet works," said @cowboypirate.

Loading Fairfax Media also rejected the video as a paid advertisement for its Age and Sydney Morning Herald websites but confirmed it has no issue with showing it in news stories. mlallo@fairfaxmedia.com.au