I have a canon eos 1000Fn and when trying to load film it just rewinds the leader stright back into the cannister.
I originally loaded a film which jammed, so i had to manually take it out as the battery died. I thought originally that the camera still thought there was a roll in there, but it did this to two films i tried to load.

Does anyone have any experience with this phenomenon? The camera didint have a lens on when i was loading the film, not sure if that makes a difference.