I noticed that lately... every once in a while an icon in my dock will become un-clickable. It will still be running fine and I can quit it but, if you try to click the dock icon, all you will get is a system beep sound and the App does not come to the front. You can still get to the App by launching it from the Applications folder or using cmd-tab (if it's running). The only way I've been able to fix this problem is to quit the App, take it out of the Dock and re-add it to the Dock. I've seen this behavior at home, at work and on another person's machine. I wonder if anyone else has seen this or even knows what kind of combination causes it. It's happened to me about 3 times and at work once and on another persons computer once so it's not a big deal or even a very common thing but, it's interesting that it only started happening lately.
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