It's a copy of Fedora bug.
Steps to Reproduce:
1. Create a KVM guest in virt-manager
2. Choose spice for display
3. Choose QXL for video
Connecting to graphical console for guest
The graphical console
Created attachment 320062 [details, diff]
Patch from Fedora fixing the problem
Should be fixed in 0.13 or 0.14. Please test.