Anyone interested in this question may like to look at the following article by William Safire in the New York Times from 1995: http://www.nytimes.com/1995/07/16/magazine/on-language-how-shrunk-snuck-in.html?pagewanted=1 It seems that in 1995 the use of 'shrunk' as a past tense was still being questioned in America (the film 'Honey, I shrunk the kids' came out in 1989). Maybe my outrage at the movie title wasn't just parochialism. Howard