i had that problem too with canon printers. Me thinks the prob is not whether you fan the paper or not. It's the quality of the paper. I was using Indah Kiat, then when i switch to Giant paper (which was on sale), it got stuck when i put a stack in it. This go on for some time and i thought my printer had problem. When i switch back to good quality paper, the problem disappear and i was able to place stack of papers back into tray without prob