Search:

Figured it out. In xCode open CRunView.m and change the "NO" in -

eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:NO],...

This is apparently the issue/solution to grabbing a screen capture in iOS 6 - http://stackoverflow.com/questions/12528365/why-is-glreadpixels-failing-in-this-code-in-ios-6-0