XCode 3.2.4 - issue after filename or path change

Question

steps to reproduce:
this code use to work, it is designed to display a random image in a UIImage field in my app.
Trying to troubleshoot an issue where I was getting "all black" displaying occasionally, instead of a random.jpg type image, I changed the filenames to make a folder full of random image's filenames even shorter, and changed the relative code to reflect the change:  now it NEVER works, although either version builds with no errors. The arc4random number (in blue) matches the item count in my folder full of random images.
Is XCode having trouble clearning out the cruft or perhaps this is a bug ?
-(IBAction)RANDOMPRINT
     //this is the old code which used to work
          int randomInt = (arc4random()%89) +1;
  //convert INT to string
          NSString *fileName = [NSString stringWithFormat: @"fingerprint%d.jpg", randomInt];
  //load UIImage from the filename
          UIImage *image = [UIImage imageNamed:fileName];
  //display UIImage in UIImageView
          [imageView2 setImage:image];
-(IBAction)RANDOMPRINT
     //this is the new code which never works
  int randomInt = (arc4random()%89) +1;
  //convert INT to string
  NSString *fileName = [NSString stringWithFormat: @"print%d.jpg", randomInt];
  //load UIImage from the filename
  UIImage *image = [UIImage imageNamed:fileName];
  //display UIImage in UIImageView
  [imageView2 setImage:image];
Tried:
1. I checked the IB file and even rebuilt the "wiring", its done correctly, same way my other image fields work and they are operating correctly.
2. tried doing the "clean all targets" thing but that didnt get it
3. tried restarting laptop
4. ran Repair Permissions ....
Any other suggestion would be most welcome. Perhaps this is a bug ?

Answer 1

ok circling back to my  original issue, I may have figured out the problem:
my folder full of images had 3 char padding, ie:
filename001.jpg
filename002.jpg
filename003.jpg
filename061.jpg
and as you can see from my code below that was not reflected in the code statement ala:
(arc4random()%61) +1;
  //convert INT to string
          NSString *fileName = [NSString stringWithFormat: @"print%d.jpg", randomInt3];
apparently you have to have it like this:@"print0%d.jpg"
This doesnt strictly make sense to me since the "d" should just be a wildcard for anything that follows.
But somehow adding a zero makes my code work again. 
As far as the renaming of Actions and Outlets it would appear under certain circumstances this is a known issue. Research it yourself, if you dont believe it.
In my case, renaming an Action in my code, saving the Project, then renaming it back, disabled the Action. The expected result is that it would "work" again. That didnt happen. This was a rename of one action in the .h file, nothing more.