Ok. So, the cover art should behave no differently at a client rather than a standalone MC installation then. I'm seeing a lot of strange behavior on the client side after changing to server/client.
I know for certain that I updated my video folders with nice folder.jpg files a few days ago. Now it seems that most of them is gone. Can this be a part of the Delete Orphans option under Thumbnail options? In addition to missing cover art, I also experience a lot of images that simply have no cover in Theater View. I have to select them to get any image at all. And if that is not enough, it often takes seconds for the new cover to appear at the info panel if a new video is selected. I've had the odd video having no cover art before, but now things like this is dramatically increased.
Can the MetaData plugin it self remove covers if used in the wrong way?