I have uploaded jpg images to the Nook Color, the images appear in the "pictures" folder, and I can view the images, but no thumbnails for the images appear in the Gallery view. How do I update the Nook's thumbs database to include thumbs of the images I have transferred to the Nook?
Problem solved! While waiting for a reply to my question, I loaded some MP3 music files onto the Nook. Although the files were transferred into the music folder, the Nook could not display any music files when I went to the music folder.
I did a "soft" reset of the Nook, and now my gallery displays the thumbs of the images I uploaded, and also can now display the music files I uploaded.