[ubuntu] Tray icons unactive/ wrong working

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http://ubuntuforums.org – Hi, I have problem with tray icons on Ubuntu 11.04. 1. Application icons - sometimes are shadowed and inactive, e.g. when I click on skype, thunderbird icon - nothing happens. 2. Other icons - indicators are never in that state, but sometimes theirs menu don't expand. Icons looks clicked but I can't see menus. Hard to say if it is related to each other, but both cases happens when I have VirtualBox running and/or I have connected second screen via VGA. With indicators - menus usually expand on second screen even if not on first. Application icons are not visible on second screen. Could y (Hardware)