McClatchy Newspapers: Efforts to cap a leaking oil well in the Gulf of Mexico suffered a major setback Saturday, after ice-like crystals clogged the inside of a massive dome meant to contain an 18-day-long spill. The crystals forced officials to move the steel-and-concrete dome, which is still on the sea bed, some 650 feet away from the well — and to scramble to find ways to stop the water-and-gas crystals from forming. “I wouldn’t say it failed yet,” said Doug Suttles , chief operating officer of …