San Jose, Calif.-based Adobe Systems said it’ll buy Web analytic software company Omniture Inc. for about $1.8 billion, $21.50 per share in cash, a premium of 24 percent over Omniture's closing stock price. The announcement came as Adobe said it earned $136 million, or 26 cents per share, in the fiscal third quarter that ended in August, down 29 percent from the same time a year earlier. Excluding one-time items, Adobe earned a profit of 35 cents per share, a penny above what analysts polled by Thomson Reuters were expecting. The maker of Photoshop, Flash and Acrobat software says its revenue fell 21 percent to $697.5 million.