Mouse pointer jumps after a click

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http://askubuntu.com – My problem is that if I click with my mouse on my desktop (unter linux) the it jumps to the left side, either in which part of the desktop (or in any open program). I can´t shutdown my pc, only with the power button and that´s not the way it´s meant ;) Also I´ve tried to select a different mouse driver but without any success, it´s not easy to change something if you have troubles to get there ;) Hope anyone can help me! This problem comes with Ubuntu and Fedora, but not with Windows ... Yours Stefan (HowTos)