Ancestry.comShares of Ancestry.com ( ACOM) fell in the extended session after the company left its subscriber outlook for the full year unchanged at 1.71 million to 1.73 million. The Provo, Utah-based online family history information provider reported a profit of $16.6 million, or 33 cents a share, for its fiscal second quarter ended June 30 on revenue of $101.3 million, an increase of more than 35% from last year's equivalent period. The average estimate of analysts polled by Thomson Reuters was for earnings of 30 cents a share in the June period on revenue of $98.8 million. For the third quarter ending in September, the company said it sees revenue of $102 million to $104 million, a range that implies some upside to Wall Street's current consensus view of 102.3 million. With the stock up more than 40% so far in 2011, however, investors were apparently expecting more, and the shares dipped 3% to $38.97 on volume of more than 315,000 in late trades.