Hi there, I'm having an annoying problem for some month now. When I use the Application Switcher (cmd+tab) I get a weird sound. After I hold the cmd key, the moment i press tab for the first time (only for the first time while holding cmd) i get the same sound that comes when using tab completion on terminal. I have no Idea why this sound is playing. I'm using newest version of Mountain Lion, but i believe it also happened on Lion. Thanks for help.