Tor Browser Bundle 4.0 Linux - Doesn't Theme

My specs;

Slackware 14.1 x86_64 gtk+3-3.8.2 qt-4.8.5 qt5-5.3.2 TBB 4.0 Linux x64

I don't remember if TBB is compiled against GTK or QT?

All of TBB doesn't show any themeing, from the startup window(s) to the browser itself.

I'm attaching a screen shot you can see showing no theming, just like the browser...

Trac:
Username: torrified