This bug was fixed in the package ubuntu-gnome-default-settings - 13.04.2
--------------- ubuntu-gnome-default-settings (13.04.2) raring; urgency=low
* Disable the Ubuntu overlay scrollbars since they cause black backgrounds in some GTK+ widgets with the Adwaita theme (LP: #1167079, #1102096) -- Jeremy Bicha <email address hidden> Sun, 21 Apr 2013 20:31:22 -0400
This bug was fixed in the package ubuntu- gnome-default- settings - 13.04.2
--------------- gnome-default- settings (13.04.2) raring; urgency=low
ubuntu-
* Disable the Ubuntu overlay scrollbars since they cause black backgrounds
in some GTK+ widgets with the Adwaita theme (LP: #1167079, #1102096)
-- Jeremy Bicha <email address hidden> Sun, 21 Apr 2013 20:31:22 -0400