Xorg version 1.14.4 with nouveau version 1.0.9
This has been happening for over a year with all versions of Xorf and nouveau that I've used. When the mouse cursor becomes a grabbing hand, the framebuffer box that is displayed around the hand is the wrong framebuffer. It displays the xscreensaver's framebuffer.
In case I am using incorrect terminology, assume this scenario:
1) My xscreensaver is set to show a picture of a cat hanging from a branch.
2) I logged in from the screensaver and I go to Google Maps.
3) I move my mouse over the map and the cursor changes from an arrow to a grabbing hand.
What I see is a box around the grabbing hand that shows the cat instead of the map. As I move the mouse around, the box moves with it (always around the cursor and always showing the picture of the cat).
This does not happen if I use the nvidia driver. This has been a bug in Fedora 17, 18, 19, and now 20 - indicating how many versions of Xorg and nouveau have had this problem.
Please let me know if this is a duplicate. I have searched for years, but I am certain that I simply cannot stumble upon the correct terminology required to find a mention of this bug.