[kubuntu] Minimized window simply disappears; can't find it to restore it

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http://ubuntuforums.org – Wise ones, Okay, so I've managed to commit a couple of newbie fumbles. First, whenever I minimize a program window, such as a browser, the window does not "drop to the bottom of the screen" and, in the form of a button, take up placeholder residence in the panel. Instead, the window shrinks down to nothing and simply disappears from the desktop. Yet the window remains operative; I know this because I'm running Pandora in a browser window that I have minimized. The window has disappeared, yet I continue to hear the music. There is no icon in the panel to indicate the presence of the (Hardware)