Thumbnails on Media Server not working

I cannot get thumbnails to show up for most movies when accessing content via the Media Server directory.  The only content that have thumbnails, are embedded type thumbnails.

I have all of my content formated in the appropriate manner:



The network share mode will show the thumbnails appropriatly, but when accessing via the Media Server option, there is only default icons.  I access all of my content via Media Server for proper streaming via Twonky.

My media server is a WD My Book World NAS.  I am accessing this via a WDTV live with the latest firmware over Wireless N. 

Am I the only one that has this issue?

No, everyone has this problem. Do a search on thumbnails.