I'm building a Sencha Touch app and wrapping it in PhoneGap (build) for native use.
My most recent build, when ran on an iPhone 5, has black, horizontal bars on the top and bottom of the screen. iPhone 4 is fine. There is hardly any difference between this version and the version that ran just fine before downloading the new build -- and the differences should only affect user accounts.
I'm using Sencha CMD v4.0.2.67, Sencha Touch v2.3.1 and PhoneGap v3.3.0 to build the application.