[ubuntu] 15.10 kvm (lib)virt-viewer => windows 10 + lxc w/two displays | mouse problem

Two displays working per http://www.spice-space.org/page/Mult...rWindowsGuests
and I can view them both through virt-viewer (but not virt-manager).

Anyways, it works. Here's the problem: When I try to move the mouse across Screen 1 to Screen 2,
the mouse pointer moves back to the opposite edge of the first window, such that the

.___________.
|+ .=>|* . .|
|_____|_____|

=> direction of the mouse (when moved toward the)
* desired target location (results in the pointer going to the)
+ eventual location (instead).

I'm assuming this is a bug. I have two questions:

1. Where would I file such a bug and get support?
2. Has anyone here had this same problem, or been able to solve it?

Thanks,

Chaim