Metathumb error

i have a lot of movies files, but i have 1 film that just wont display the metathumb, when i get content data the thumb is shown, i download it but it still shows the black box, when i play the movie the thumbnail shows at the bottom of the screen, just not on the selection screen, what could be wrong with this ?

delete the folder .wdtv

then reboot, this will force the WD to re-cache the thumbs

i deleted the wdtv folder, but had to reboot manually, all works good now, weird coz ive changed loads of images and never had to do that, least it works now, thanks