wait_fences problem with UIAlertView

[SteveMobs]

When the home button is pressed while an alert view is shown, I revceive a wait_fences: failed to receive reply: 10004003 error message. What does this mean? It even happens I an app as simple as this:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [window makeKeyAndVisible];
    UIAlertView *changeAlert = [[UIAlertView alloc] initWithTitle:@"test"
                                                          message:nil
                                                         delegate:nil 
                                                cancelButtonTitle:@"cancel" 
                                                otherButtonTitles: nil];
    [changeAlert show];
    [changeAlert release];
    return YES;
}

The error comes right after applicationDidEnterBackground being called.

What does this mean? What's a correct way to show an alert view that is 'Home button resisten'?

Thanks!

[apatsufas]

I'm not sure if this is causing the error but take a look at the iOS App Programming guide here
In the App States and Multitasking section Apple states that

Clean up resources for active alerts when moving to the background. In order to preserve context when switching between apps, the system does not automatically dismiss action sheets (UIActionSheet) or alert views (UIAlertView) when your app moves to the background. It is up to you to provide the appropriate cleanup behavior prior to moving to the background. For example, you might want to cancel the action sheet or alert view programmatically or save enough contextual information to restore the view later (in cases where your app is terminated).

For apps linked against a version of iOS earlier than 4.0, action sheets and alerts are still dismissed at quit time so that your app’s cancellation handler has a chance to run.

[SteveMobs]

Thanks, I found something similiar in the UIAlertView Class Reference:

Important In iOS 4.0 and later, alert views are not dismissed automatically when an application moves to the background. This behavior differs from earlier versions of the operating system, where alert views were automatically cancelled (and their cancellation handler executed) as part of the termination sequence for the application. Now, it is up to you to decide whether to dismiss the alert view (and execute its cancellation handler) or leave it visible for when your application moves back to the foreground. Remember that your application can still be terminated while in the background, so some type of action may be necessary in either case.

Actually, I want my alert view to be visible after the app is back in the foreground. I freaking out right now. No matter how and were I show an alert view, I always get this wait_fences error.

I found some threads which recommend to call the selector showing the alert view with a delay. This didn't work either.

Can someone post a simple class with an alert view, that does not cause this errror, please?

[SteveMobs]

I just downloaded the "LaunchMe" sample app from apple... when the app start, an alert view is shown immediately. Pressing the home button results in ... wait_fences: failed to receive reply: 10004003



Help!