I have been having a problem only recently involving window focus using my MBP running 10.6.8. For some reason every couple of minutes my windows lose focus and I have to click on them to regain the focus. If I'm watching a video in fullscreen, the Dock appears out of nowhere when this happens. When the windows lose focus, I can press ⌘ + Q and the window I was using regains focus. This makes me believe it is some sort of program that is causing the problem. A video of the issue can be seen here: http://www.youtube.com/watch?v=XBKaH5zhRMY An image of the fullscreen video issue can be seen here: http://imgur.com/8oJYm Can anyone suggest how I can figure out what is causing the problem and how I can fix it? Thanks!