A massive balls-up by a touch judge ended Ireland's bid for a fifth Triple Crown in eight seasons.
Wales scrum-half Mike Phillips celebrated his 50th cap by scoring an opportunist try in Cardiff.
But the touchdown came after skipper Matthew Rees took a quick throw-in with a different ball from the one that was sliced into touch by Jonathan Sexton, which is against rugby's Law 19.2.
Ref Jonathan Kaplan consulted Scottish assistant official Peter Allan before awarding the score, but the Irish players were furious as replays confirmed the try should never have been allowed.
For the full story, see this week's Sunday Life.