The first paper tray on the printer keeps misfeeding paper causing a paper jam. If there is a jam, you might try opening the first tray and seeing if the misfed paper is there which often seems to be the case (if not, you might try the left side of the printer). To try and prevent this, it has helped to either keep less paper in the first tray OR to keep no paper in the first tray. Frederic said the printer company has been contacted about the problem.