avant-window-navigator 0.3.2.1-4ubuntu1~ppa1 from Julien Lavergne's PPA solves the problem on my system too (nvidia-190 drivers, 64bit, karmic)
avant-window- navigator 0.3.2.1- 4ubuntu1~ ppa1 from Julien Lavergne's PPA solves the problem on my system too (nvidia-190 drivers, 64bit, karmic)