White tab was not pulled straight.
On a six or two
lens camera, this defect will be on the top or bottom.
When the white tab is not pulled straight, the negative and positive
do not come together aligned.
If you see this
defect, open the film back,and remove and clean the film rollers immediately.
Do to the misalignment, there is usually edge leakage of the film
chemicals onto the film rollers.
If you open the film back, and leave the film pack in place you will
not lose any film.
If you do remove the film pack, you will only lose the first sheet.
There is a slight
chance that it is defective film causing this problem.