I purchased a Jetbook Color specifically for reading PDF documents. The firmware updates have made quite an improvement in the product. I have noticed that some of the images don't appear on the screen though. For example look
here. The cover shows up on my computer using Acrobat reader, and using Foxit reader, but is absent using Jetbook Color. Various other images, but not all, are also missing.
I am very interested in knowing why this is the case, and if other users have had the same issue.