I'm having a very weird problem. I constantly have to click twice on objects to interact with them, similar to the way as if the program would be inactive. So the moment I'm typing this text, I actually have to click twice on the smiley icon to include it in this text. I'm using 10.6.8 and a Logitech mouse. The problem occured, when I installed the latest security update a couple of days ago and to be frank, it's driving me nuts! Any idea what this is about or how I can solve it? Maybe uninstall the last security update?