At this point it is pretty clear that the war for summer box office king is going to be between Transformers: Revenge of the Fallen and Harry Potter and the Half Blood Prince. To stoke the flames for Potter fans, it turns out they are going to have to wait two weeks to July 29th before they can watch the movie on the IMAX. On the bright side they can still watch it on standard screens on July 15th.
Now the change isn't really Transformers fault, its Warner Bros. who forgot to check the IMAX schedule when they moved Harry Potter from a Christmas release to the summer and didn't realize that Transformers 2 was contractually locked in for four weeks due to incorporating IMAX style footage into the film.
The main takeaway, besides mild amusement, is the knowledge that you have only one month to watch Transformers: Revenge of the Fallen The IMAX Experience which includes extended scenes, several with CGI elements at the IMAX scale, a first for the format. Thanks to Ian for the link.