^ It was in Variety (the hair bit). At least when I read it.
I think the diva bit was just an attempt for Jackson to cover his own ass. I could see them clashing a little because he seems to have a very strict interpretation of how he sees his characters and Ryan has his own approach often to things, but no one has implicated Ryan as being an ass like that, ever. I doubt he suddenly became one now, on this.
Tara!