Ubuntu 13.04 – Fix Three-Finger Window Moving Not Working

I juste upgraded to Ubuntu 13.04 on my Samsung New Series 9 (NP900X4C-A01FR).

Before, in 12.10, I could move/minimize/maximize the windows, using 3 fingers. These 3 functions doesn't work anymore.

How to recover these ?

And here is what works :

• 2 fingers : scrolling
• 3 fingers : 2 tap to display the windows switcher
• 4 fingers : 1 tap to launch the dash, swipe gesture to show/hide the launcher

Thanks.