I make these tabs for newest version of QTTabBar. Newest version support now custom background! I made backgrounds with menubar disabled.
I'm using this Leopard visual style [link]
It has shamefully few bugs though.
This skin look nice with this theme too, but it has borders on windows. [link]
Download QTTabBar from here [link]
Make sure you set these from QTTabBar settings-appearance:
Heigth: 22 px
Width: Fixed, 200 px
Toolbar background image: Tile
Thats all... Enjoy Leopard lovers