Missoniis specializing in surprises at the moment. First, there was last Spring's collection. It polarized the critics, mesmerized the public when it hit the stores. Then there was the collaboration with Target, where a week's worth of pop-up shop sold out in a day during New York fashion week. Now there's this Spring's show, which, in its own way, was as startling as the one a year ago that marked a definitive shift in the Missoni ether. In other words, it will divide opinion.