"We've completed the review of your application; however, we cannot post this version to the App Store because it displays an empty iAd banner when ad content is not available. The banner within the app should be hidden whenever ad content is not being served by iAd"
If you plan on putting iAds into your iPhone app, you must set the delegate and respond to
- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error;
to hide your iAds view if they are not able to load.