MAASTRICHT -- It was every dealer's nightmare. Just two hours into the vernissage of the European Fine Art Fair (TEFAF) last Thursday, Mar. 11, 2010, the electricity went out for close to ten minutes. When darkness descends at art-laden events, the time is ripe for light-fingered thieves. Last year, during the 22nd version of this fair, robbers lifted period diamonds off the stand of London dealer S.J. Phillips Ltd. This time, choice objets d'art, substantial antiques and Old Master paintings remained in place.