All, I collect images on my laptop and copy them over to my Dinc and drop them in a folder via usb connection. On the PC the thumbnails and pic works and looks fine. However, for SOME of my transferred pics, when I view through gallery there is no thumbnail. For others, there is a thumbnail, but when accessed I get a black screen. Other pics work fine. Astro Viewer, at times, will give the same results. It's not consistent. Thoughts?