Several months ago I wanted to switch a roll of film in the middle of the roll. I pressed the mid-roll rewind button, and it rewound the film all the way into the canister (without leaving any leader). I loaded the next roll of film and it rewound it all the way into the canister without me wanting to! It has done this with every single roll of film I've tried to load. What can I do to stop this? Thanks for the help. Canon Rebel T2 35mm film ====== Problem Solved: The mid-roll rewind button was stuck. A toothpick was able to unstick the button.