OpenGL ES Projects and iPhone SDK 3.0

If you're having problems getting any of the older OpenGL ES sample code running under SDK 3.0 - specifically if you get a white screen rather than what you're supposed to see, here is the problem - delete the line of code specified below from the App Delegate's applicationDidFinishLaunching: method:

- (void)applicationDidFinishLaunching:(UIApplication*)application
{
    CGRect  rect = [[UIScreen mainScreen] bounds];
    
    window = [[UIWindow alloc] initWithFrame:rect]; // <-- Delete this
    
    GLViewController *theController = [[GLViewController alloc] init];
    self.controller = theController;
    [theController release];
    
    GLView *glView = [[GLView alloc] initWithFrame:rect];
    [window addSubview:glView];

    glView.controller = controller;
    glView.animationInterval = 1.0 / kRenderingFrequency;
    [glView startAnimation];
    [glView release];
    
    [window makeKeyAndVisible];

}

The problem is that there's already window instance in MainWindow.xib, so creating a new one is problematic - there can only be on instance of UIWindow. Under 2.2.1 and before, it worked, under 3.0, it causes problems. In both cases, the line of code should be deleted, however.