As a workaround you can downgrade compiz to 0.8.6 version:
http://guiodic.wordpress.com/2011/05/25/risolvere-il-problema-dellarea-di-notifica-inusabile-in-ubuntu-natty-11-04/ (in English, too)
As a workaround you can downgrade compiz to 0.8.6 version:
http:// guiodic. wordpress. com/2011/ 05/25/risolvere -il-problema- dellarea- di-notifica- inusabile- in-ubuntu- natty-11- 04/ (in English, too)