I have one.
I've compiled and run in an iPad simulator.
When I try to debug/run it on a device (iPad 4) with iOS 7, I get informed that:
No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=armv7s, VALID_ARCHS=armv7).
I haven't dug in yet. Nonetheless, anyone else seeing issues? Post up!
EDIT: I set Build Active Architecture Only to No and the application launched on the device. This exposed issues with some plists I use though. Digging in...