After clicking "Upload more files" at the end of the wizard, Firefox 3.6 asks me whether I want to resubmit information. If I say yes, I'm taken to the first page of the upload wizard (with the licensing tutorial; wouldn't it make more sense to go to the second page?) where the Next button is grayed out. There's no way I can advance in the wizard short of going to another page, then revisiting Special:UploadWizard.
Observed on commons.prototype.wm.o/uwd
Version: unspecified
Severity: enhancement