Originally Posted by larrymohr
I also found out that previous to firmware version 1.9.5, the kepub covers were in color. After 1.9.6, they are also in B/W like side loaded book covers.
All the thumbnails I have looked at have that small "1" in the corner?
The images were optimized in 1.9.6 to improve performance (Smaller+B&W images means less data to load and faster rendering, etc). So keep that in mind when changing covers.
We are aware of the white border issue.