Rear Brake Squeaking

[mcintyre_aerospace]

Well I recently installed new rear brakes, and now I hear a, well, squeak squeak, from the rear. I then took my rear tire back off to find out what was wrong, and it turns out the spring at the top was hitting some little fin things inside the shoe holder. The squeaking is really prominent when im driving. I was wondering if I was the only one out there running into this problem. Thanks