The speedbrake handle is often set in a position (flight detent or up) where the metal notch on the side of the handle is used as an indicator/pointer. This is not the correct pointer, but it is very easy to make this mistake since the real pointer, the arrow on the backside of the handle, is hardly visible when moving the handle while the person is seated in one of the cockpit seats. It leads to complaints from pilots (!) and engineers, that the handle cannot be moved to fully up position, or that it does not move to full up during autospeedbrake movement after touchdown. This tip seems to be too easy, but this error happens so many times that a notification on this website is on its place.
See the pictures for clarifications.