At least the thumbnails show up for you. I used Playlist Buddy to download all my thumbnails, and they don't show up at all in my playlists.i use the retroarch ones.
tried both and same results
yes the path is correct, i see the thumbnails but when i do a fast scroll between games and playlist thumbnails go black and then it freezes.
http://sendvid.com/qkltjv79
in this video not freezes but sometime it freezes XD