MixiSDK problem

gistfile1.m

// Mixi.m

- (void)clear {
    NSUserDefaults *defaults = [self userDefaults];
    [defaults removeObjectForKey:@"clientId"];
    [defaults removeObjectForKey:@"expiresIn"];
    [defaults removeObjectForKey:@"state"];
    [defaults removeObjectForKey:@"accessTokenExpiryDate"];
    // yyjim: is this need to do synchronize after removeObjectForKey?
    // [defaults synchronize]
    [self storeAccessToken:nil refreshToken:nil];
}

// "clear" is only call in logout in this Mixi.m
- (void)logout {
    [self clear];
    self.accessToken = nil;
    self.refreshToken = nil;
    self.expiresIn = nil;
    self.state = nil;
    self.accessTokenExpiryDate = nil;
    self.mixiViewController = nil;
}

// MixiWebViewController.m

- (void)dealloc
{
    [super dealloc]; // crash here, this method should call in the end
    self.url = nil;
    self.delegate = nil;
    // [super dealloc];
}