I've been printing a large proofing job on my 6100, using the 24" wide Canon Commercial Proofing paper (200gsm). Actually, very nice paper, especially for a proofing paper -- reminds me a little of Silver Rag, in a strange way. Anyway, I found most of the prints had what looked like tank tracks running down the page -- not on every print, and not always in the same place, but usually roughly in the middle, the other about 18" or so from the right side of the printer.
Fortuantely, these were just proofs for me, but it would have destroyed almost every print had they been important. I've used much heavier matte paper (though only 13x19 sheet fed) as well as some Hahn. Fine Art Pearl, and ran a roll of thin-ish 17" Epson Proof Semi-Matte without incident.
Anyone have this problem and how did you cure it? Thanks.
Nemo