Final update on my lens for those interested: Canon got the lens Tuesday (8/27) and Wednesday afternoon I got an email from them saying it was shipped out. Delivered today (8/30) and other than a scuff mark on the lens hood, it looks like the day I got it. Took a quick couple shots and no issues. They ended up replacing the fixed barrel assembly and the lens assembly with USM. They cleaned and tested it. So happy I sent it in, worth every penny it cost me. Will think about CPS, I do qualify for the Gold Membership. Next new lens will have a CarePAK with it.