When I launch my app on iOS 5.1, on a device (only tested on retina display so far), the Default@2x.png image is displayed with a single green line below the bottom of the image. I’ve confirmed the image is 640×960, and does not contain this green line.
I’m guessing this must be due to an issue with the PNG optimization tool Xcode is running prior to adding the resources to the bundle, especially since I don’t see this when I run using the simulator.
Is there a way to repair or update this PNG optimization utility? (I’m running the latest Xcode 4.3.2 for Lion, from the Mac App Store).