Thanks TSB... yeah, I wondered how the fuser levers would cause this if it's happening before (or during) image formation.

I just talked to the customer this morning, and she's been re-using label sheets, over and over again. I suspect she might have gotten a label stuck in the registration section along the way (somewhere, I can't see it), but
customer does not want to spend a lot on repairs, so I told them the next best option is to replace it with another disposable machine.
OC