Barbra Streisand may have a voice like buttah, but she has an ego as fragile as a china doll. In the latest item on her Website (www.barbrastreisand.com), the songstress takes issue with an ad being run by Republican Marilyn O'Grady, who is challenging incumbent Democratic Rep. Carolyn McCarthy of New York. According to the "truth alert" posted on Streisand's site, O'Grady has "made a last-ditch effort to win headlines by devising ads in which she blatantly misquoted Barbra Streisand, fabricating outrageous quotes and completely misrepresenting Ms. Streisand's deep opposition to the Iraqi dictator, Saddam Hussein." The Republican's ad says, "Barbra...