In iphone app, with 3 viewcontrollers with UInavigationcontroller, from 2nd to 3rd view, dealloc is not called
[self.navigationContrller pushViewController:titlesViewController];

[titlesViewController release];

@implementation TitlesViewController
NSMutableArray *titleArray;
NSMutableArray *bidArray;
...
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
...
    [self.navigationController pushViewController:detailViewController animated:YES];
    [webView release];
    [detailViewController release];
    [titleArray release];
    [bidArray release];
    NSLog(@"****** titlesviewcontoller didSelectRowAtIndexPath");
}

- (void)dealloc
{
    [titleArray release];
    [bidArray release];
    [super dealloc];
    NSLog(@"****** titlesviewcontoller dealloc");
}
@end

[titleArray release];
[bidArray release];