[Kindle] No Book Covers

For some reason books are no longer showing the book cover image in grid view on my Kindle PW2. It just shows the default Amazon cover I am on Calibre 3.3. I am also using the Kindle Screensaver hack and it will show the book cover when I open the book.

Is there something that changed when I updated Calibre? Or something I did? Never run into this issue.