iPhone SDK Photopicker sample - impossible to add a subview!

Question

That's pretty simple to test and explain.

If you get the PhotoPicker sample, and you add a UILabel to the timedPhotoFire:timer method, like this:

- (void)timedPhotoFire:(NSTimer *)timer
{
    //ADD THIS LABEL HERE
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(200, 180, 50, 30)];
    [label setText:@"Hello!"];
    [self.view addSubview:label];




    NSInteger cameraAction = [self.cameraTimer.userInfo integerValue];
    switch (cameraAction)
    {
        case kOneShot:
        {
            // timer fired for a delayed single shot
            [self.cameraTimer invalidate];
            cameraTimer = nil;

            [self.tickTimer invalidate];
            tickTimer = nil;

            break;
        }

        case kRepeatingShot:
        {
            // timer fired for a repeating shot
            break;
        }
    }
}

It doesn't display any label...

So... why???

Note: I have the same problem in my application, but this is the easiest way to reproduce this behavior.