Why Isn't Ellen Page In Jack & Diane anymore?

I'm desperately seeking answers.I don't know if afterellen has already mentioned why but i need confirmation or at least some assurance.Whyyyyy????

I've been faithfully checking and rechecking imdb.com countless of times and seeing if ellen p has been listed back into the movie but it only looks to me as if though she pulled out.whereas her good friend olivia thirlby is still in it.plus they've unfortunately pushed it till 2010 which makes me super upset.is ellen p trying to push herself away from the lesbian typecast she's been getting lately or what?honestly,i thought she'd be perfect for the role.