I'm hoping someone out there can back me up on this...

I've been working on an application that allows the end user to record a small audio file for later playback and am in the process of testing for memory leaks. I continue to very consistently run into a memory leak when the AVAudioRecorder's "stop" method attempts to close the audio file to which it's been recording. This really seems to be a leak in the framework itself, but if I'm being a bonehead you can tell me.

To illustrate, I've worked up a stripped down test app that does nothing but start/stop a recording w/ the press of a button. For the sake of simplicty, everything happens in app. delegate as follows:

@synthesize audioRecorder, button;
@synthesize window;

- (BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
 // create compplete path to database
 NSString *tempPath = NSTemporaryDirectory();
 NSString *audioFilePath = [tempPath stringByAppendingString:@"/customStatement.caf"];

 // define audio file url
 NSURL *audioFileURL = [[NSURL alloc] initFileURLWithPath:audioFilePath];

 // define audio recorder settings
 NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
      [NSNumber numberWithInt:kAudioFormatAppleIMA4], AVFormatIDKey,
      [NSNumber numberWithInt:1], AVNumberOfChannelsKey,
      [NSNumber numberWithInt:AVAudioQualityLow], AVSampleRateConverterAudioQualityKey,
      [NSNumber numberWithFloat:44100], AVSampleRateKey,
      [NSNumber numberWithInt:8], AVLinearPCMBitDepthKey,
      nil
 ];

 // define audio recorder
 audioRecorder = [[AVAudioRecorder alloc] initWithURL:audioFileURL settings:settings error:nil];
 [audioRecorder setDelegate:self];
 [audioRecorder setMeteringEnabled:YES];
 [audioRecorder prepareToRecord];

 // define record button
 button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 [button addTarget:self action:@selector(handleTouch_recordButton) forControlEvents:UIControlEventTouchUpInside];
 [button setFrame:CGRectMake(110.0, 217.5, 100.0, 45.0)];
 [button setTitle:@"Record" forState:UIControlStateNormal];
 [button setTitle:@"Stop" forState:UIControlStateSelected];

 // configure the main view controller
 UIViewController *viewController = [[UIViewController alloc] init];
 [viewController.view addSubview:button];

 // add controllers to window
 [window addSubview:viewController.view];
 [window makeKeyAndVisible];

 // release
 [audioFileURL release];
 [settings release];
 [viewController release];

 return YES;
}

- (void) handleTouch_recordButton {
 if ( ![button isSelected] ) {
      [button setSelected:YES];
      [audioRecorder record];

 } else {
      [button setSelected:NO];
      [audioRecorder stop];
 }
}

- (void) dealloc {
 [audioRecorder release];
 [button release];

 [window release];

 [super dealloc];
}

The stack trace from Instruments that shows pretty clearly that the "closeFile" method in the AVFoundation code is leaking...something. You can see a screen shot of the Instruments session here: Developer Forums: AVAudioRecorder Memory Leak

Any thoughts would be greatly appreciated!