All of a sudden, my G key is semi-unresponsive. It still works, but not normally the first time I press it. So when I type words that contain a "g," I often see it missing and need to go back and enter it again. Quite a nuisance. Any ideas what this might be? The Apple Care lady asked me to download this update that was supposed to treat an unresponsive keyboard (which has apparently been a problem for some Leopard users). Didn't fix it, though. And it's just this one key. Thanks in advance for any help!!