[danmdan]

Does the problem occur in all lighting conditions? I know people have complained in the past about the fuji's in low light, having very slow autofocus for both photo and video uses.

Have not tried to use video function much other than in good outdoors daylight. As soon as the lens is seeing e.g. something closer than a distant scene, it very quickly changes focus, going out then snapping back in - but this ruins a smooth video. Another example - in a well lit hotel gym, panning around the various pieces of equipment, the lens was re-focussing as every piece of the gym equipment came into the viewfinder; briefly going out of focus before acquiring focus on the new item.