Ivo Beltchev - 2013-01-03

Solid background skins always get a border. You can change the opacity to alpha. Add this:
Main_opacity=alpha
Submenu_opacity=alpha

On top of that you have to convert the two background bitmaps to 32-bit and set the alpha channel to all white.

It won't look very nice though. The submenus will all merge together because they are the same color.