Hi LightStar,
I don't have any problem turning the start panel shadowns on/off in here.
Try this, open WindowBlindds config windows, then open the skin folder and delete all files with the extension .wb4
then go back to the WB config window and apply the skin. (I gave this order case once you open WB config window,
the cach files are created/refreshed).
If stil fail, I can look the skin for you if you want, if you do, log in the stardock IRC and private message me with
a link where i can get the skin.
Regards.