Are you sure you went low enough on the frame? It does not hit on mine while pedaling, but does back-pedaling. Technically, you should not be cross-chaining (new word :>) ) meaning small ring in front and back or the reverse, large and large, it bends the chain too much. I've adjusted mine to millimeters from the big ring.
Yes it is VERY low.. Just like you, I've adjusted it millimeters from the big ring. Yeah I know your not supposed to ride like that, but I am just trying to tune this thing to a T before I get it out. I might shave a little metal off the front of the cage; I don't think it will hurt it..
i have the same frame and had a buncha problems withe the front d. first i bought a deore xt, which was a pain to set up. i later switched to a 35.0 top pull low clamp sram x9. which works just fine. no problems at all