the imax official site says a completely different date...Nov 21, 2009.
HARRY POTTER AND THE HALF BLOOD PRINCE: AN IMAX 3D EXPERIENCE- NOVEMBER 21, 2009
I Effing hate this. Warner Brothers and Imax are now on my bad list...
They're a bunch of blood-sucking, money-grubbing a-holes, just like every other film producer in corporate America.
I'm extremely disappointed in them.