Brad Pitt And World War Z Director Not Speaking

The Vulture tells us:

The horde of zombies in Paramount Pictures’ World War Z aren’t the only ones ravenous for brains: So is the troubled blockbuster’s star and producer, Brad Pitt, who Vulture hears exclusively from multiple production sources has become so frustrated with the film’s director, Marc Forster, that he stopped speaking to him altogether as the production heads into at least three weeks of reshoots.

As we just reported yesterday, the ending to the film is going through a major rewrite. Now with no communication between Pitt and Forster, how much more will the quality of the film be affected?