When we use iOS system dialog for camera and image cropper, we get EXC_BAD_ACCESS on [rootViewController dismissViewControllerAnimated:NO completion:nil] because it calls [QIOSTextInputResponder nextResponder] on responder that no longer exists.
When I comment out line
[m_textResponder release]
in qiosinputcontext.mm everything works fine (but it will probably cause memory leaks).