This problem was reported by Sauzee, Chrissssl, and myself ,Joncat. That's three users of registered versions of MC11, remember us?
MC11.316 is causing a behavior that removes random thumbnails and won't rebuild them. We have each observed it, and devised a workaround. Maybe there is something in common with our systems (I know mine is not oc'd and runs prime95 and memtest stable) that causes this
Take this one album, Reggae Sunsplash, I believe that the image has been added to the tag because I can delete the album file in the cover art directory and then the thumbnail still appears in Playing Now. Now maybe MC has some other database or something to track this so I don't know.
If it truly is tagged, then the thumbnail simply isn't shown when browsing panes and view schemes; library browser seems to work okay and seems to act like you are highlighting the album in a pane which is also the quivalent of playing now.
The result is that there are album thumbnails NOT VIEWABLE in pane view schemes, but are viewable only in Playing Now or Library Browser.
I have spent about three hours so far updating thumbs I already have, once it dawned on me that something didn't feel right.
www.catuccio.net/sunsplash%20thumbnail.jpgwww.catuccio.net/sunsplash%20thumbnail%20appears.jpgwww.catuccio.net/search%20for%20sunsplash.jpgwww.catuccio.net/search%20for%20sunsplash%20thumbnail%20appears.jpgFYI, same result if in Audio View Scheme.
WORKAROUND (just use the Spart plugins "re-direct" thumbnail link to folder option):
If you have blank thumbnails in any panes and your tree is let's say, Audio, right click and check to see if Image>Copy 1st file to clipboard is available. If it is it means there is cover art tagged on the file(s).
2. Use King Sparta's Move Cover Art plugin to copy all the art of every file/album in your ibrary to folder.jpg or one Cover art folder; either works.
3. Select all files/albums and choose Remove Cover Art and obviously choose NOT to delete files from the hard disk.
4. Select everything again, and choose a Quick Search in File/Directory.
5. This should rebuild your thumbs permantently...I'm still not sure though...we'll see.
I tried to rebuild thmubs after the tagged art had been copied into the album folder and MC could not do that...I'd try the alpha but after reading the posts and the long run of MC11...I am not really up for alpha testing yet, so if anyone is using the alpha check to see if thumbs go missing and if they can be rebuilt correctly.