Bug#455792: Broken fading(in&out) on dual monitor setup 2.0.0-5

[llimaa]

Package: gksu
Version: 2.0.0-5

Problem:

On my dualhead(dual monitor setup) on a Nvidia Geforce Quadro 1000,
GKSU just fades the left Display and the Dialog appears on the display
where the mouse cursor is. 

It should fade(in&out) & grab on both displays.
The GKSU of Ubuntu does it but i don't know why.

Thanks in advance
-llimaa