UITabBarcontroller is unresponsive

Question

I have noticed several times that the UITabController is not very responsive to touches on the individual tabs.

What I did to show this is I implemented the following method from the UITabBarControllerDelegate and saw every time it got fired:

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
NSLog(@"VIEW CONT SELECTED");   
}

I noticed that I had to tap on the UITabBarController's tabs with a lot of precision to get the particular event fired. I only have 3 tabs so, its not like I am lacking real estate.

Could it be the size of the images that I am setting for the individual tab bar items?

Thanks for your help