Arnold Layne came out in '67, so even though I was aware of it in a peripheral way (through older siblings) I can't pretend I paid it much attention until '72 or so. Probably all that teenage NME reading led me back to it. It may well have been one particularly intriguing (Charles Shaar Murray?) article on Syd Barrett's whereabouts that did it. Anyway, it had been a while since I'd heard it, until this morning, when the BBC did a piece on him. Idea Generation Gallery, in Shoreditch, London, is currently showing Syd Barrett: Art & Letters, and there are a few pictures from the exhibition here. This is the 'unofficial' film for the song.