[ubuntu] menu buttons not work when program unminimized

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http://ubuntuforums.org – Hi, I am using Ubuntu 12.04 and I have noticed a strange behaviour of the launcher. For some applications docked to the launcher the menu buttons (or some of them) stop working when the program is minimized and then unminimized (by clicking the icon on the laucher) For example, launch smplayer by clicking on the icon on the launcher, check that the buttons "Open, Play, Options ..etc" all work, minimize it, then restore it by clicking the launcher icon, some or all of the menu buttons stop working (click and no response) sometimes this happens right the way, sometime it happens onl (Hardware)