No, I'm running a full-screen TM. Just tried with auto-pick color option disabled, but it made no differences.
What's happening is it shows no covers at all or only a few covers with the rest either as nothing or as "NoArtwork" image.
Sometimes it shows all images correctly, but if I click on play next button, no covers show up. The error is not always thrown, but the covers are not displayed properly most of the time, again only with big image files.