UIWindow endDisablingInterfaceAutorotationAnimated: error

I'm receiving the following error when a user is in MFMailComposerViewController and presses the Home button:

[UIWindow endDisablingInterfaceAutorotationAnimated:] called on > without matching -beginDisablingInterfaceAutorotation. Ignoring.

I have looked around the forums and some other people have experienced this error in different circumstances, but there is no solution.

I have set shouldAutorotate to this in all the View Controllers in the app:

- (BOOL)shouldAutorotateToInterfaceOrientation:
                                  (UIInterfaceOrientation)interfaceOrientation
{
    return interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown ||
           interfaceOrientation == UIInterfaceOrientationPortrait;
}