Our Phaser 3610 picks up 8.5X11 sheets normally but when we change to 8.5X11 Avery labels they won't pick up on the first pass but will pick up on the second pass! As a point of interest, up until two weeks ago the Avery labels picked up on the first pass just fine! These labels are all from the same batch.
This all came to my attention when someone had a problem printing. I found that someone had been playing around with the control panel settings and the default paper size had been set to folio. I changed the settings back to 8.5X11 and checked all the other settings and it has been fine with the exception of the labels needing to pass thru twice.