[Milhouse]

odd that you say it never updated the set artwork, i could of sworn it used to, i must be going mad :-).

A change to the movie wouldn't update the set directly, however if the set is "sharing" the artwork of one of the movies (there will be a single texture cache entry used by both the movie and the set) then whenever you update that movie artwork the set should start to show the new movie artwork (eventually). This would only work as long as you replaced the shared movie artwork while keeping the exact same filename - if you were to rename the movie artwork, the set would still be referring to the old (and now non-existent) artwork. So changing the movie artwork may have appeared to update the set, and may still do so, but it's really a side effect of the sharing.