Whenever I try to drag an icon and move it within dock icon drags around with cursor but does not relocate. Same happens with any files in folders, desktop etc. Icons just drag around and I can't seem to release them at all. I've tried to adjust settings in Accessibility but nothing seems to work. Not sure if I should re-install OS X 10.8 or maybe there are some system preferences I can adjust. Did anyone experience the same issue?