In an iPad application with a UINavigationController, everything works in portrait mode but in landscape mode the back button sometimes only goes back half a level. That is to say, on the first press the title bar animates as if it was popping a controller, and on the second press it animates the content popping.

Has anyone found a solution to this? The contradictory solution in this question did not help. I have a shouldAutorotate method in the navigation controller but no others.

-(BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)inOrientation {
    return YES;
}