iOS Update to my app causing crash

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (! [defaults boolForKey:@"notFirstRun"]) {
    UIAlertView *firstrun = [[UIAlertView alloc] initWithTitle:@"Sermon Preference" message:@"Do you prefer audio only, or video sermons?  (This setting can be changed at any time in the Settings Page.)" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Audio", @"Video", nil];
        [firstrun show];
        [firstrun release];
    [defaults setBool:YES forKey:@"notFirstRun"];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
        if (buttonIndex == 0)       {   
            NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
            NSString *nope = @"Audio";
            [defaults setObject:nope forKey:@"videosermons"];
            [defaults synchronize];


        }
        if (buttonIndex == 1)        {
            NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
            NSString *yup = @"Video";
            [defaults setObject:yup forKey:@"videosermons"];
            [defaults synchronize];        }

        }

- (void)viewDidLoad
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];


        NSString *currently = [defaults objectForKey:@"videosermons"];

    if ([currently isEqualToString:@"Audio"]) {
        segment.selectedSegmentIndex = 0;
    }
    if ([currently isEqualToString:@"Video"]) {
        segment.selectedSegmentIndex = 1;
    }


    NSString *firstName = [defaults objectForKey:@"firstName"];
    if (firstName  == nil) {

    }
    else {
        myTextField.text = firstName;
    }
    NSURL *url = [NSURL URLWithString:@"http://www.bellavenue.org/worship.html"];
    self.content = [NSString stringWithContentsOfURL:url];
    [super viewDidLoad];
}

if ([currently isEqualToString:@"Audio"]) {