Mamiya 645 Polaroid back: light leaks or what?

Hi.

It's the second pack of Fuji FP-100 that I get this strange things on the film - see attached. Both color and bw, different packs, so it's not a specific pack issue.

Looks to me it's a light leak, but: I have never, really never had this before. It happened all of a sudden yesterday afternoon. I had shot another pack like 15 minutes before.

What do you guys think it is? Anyone had this experience already?

Perhaps time to clean the rollers in the back?

Q.G. said:

Perhaps time to clean the rollers in the back?

Click to expand...

Yes, that worked...Thanks, I managed to save almost an entire pack.