July 16, 2009
Another Google question :)
and a few others..
P.S: Sry for the delay.. will be open longer
P.P.S: udupendra sent this question(in a slightly different form) at a timestamp lesser than the timestamp I posted it, but I had not seen it. This is to ACK his contribution :)
Cracked by: udupendra , Logik , Higgers , Raghuvansh , Deepthi JS , Goyal , Ananth , nishansolo , Gurupad , Johny Walker , Dibyo , jayanth , krudebox and Nakul.
Answer:All have the Triforce symbol from the Legend of Zelda series hidden in them.