[kubuntu] Ctrl + V will not work if I close the application I copied text from

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http://ubuntuforums.org – Hello. I always have to keep an application open I copied text from to paste the text somewhere. In fact the copied text will be saved to Klipper (if Klipper is on) after it has been copied. But why cannot a simple shortcut Ctrl + V be used to paste the copied text? OS: Ubuntu 10.04.4 LTS KDE version: 4.4.5 (Hardware)