Hi, I installed a short time ago Ubuntu 12.04 LTS Desktop system. I'm using Unity Desktop. When I work in LibreOffice 3.5.4.2 Build ID: 350m1(Build:2) it happen often that that the screen in the workspace where is LibreOffice darken a while and temporarily freeze the LibreOffice. Why this happen? Is this a bug? -- Regards from Pal