Thanks for the feedback!
I guess there is an issue with display refresh
It's hard for me to test, since it works fine on my Iliad. I probably have changed some setting...
@KillerRabbit: after starting MiniPad, do you see anything if you force a display refresh by pressing a button like NEWS or BOOKS?
@ericshliao: could you start MiniPad via run.sh (or xx) on the command line? I wonder if it says 'could not open display...' It might be a permission thing of the Xserver...