I've just upgraded to 1.0-rc2 from 0.99.4, and I noticed that there is now a warning against using @2x for retina filenames due to incompatibilities.
Can someone tell me what those incompatibilities are? I've been using @2x for the past 10 months with my own hacked up 0.99.4 without any apparent problems (my app is a mix of UIKit and Cocos2d, and switches between the two often).