Sorry if this has been posted previously, I tried to find a previous thread to answer the question but found none. New Al MB, otherwise very happy with it. However, twice now when I've run the battery down (as recommended to keep the battery healthy), and then put it to sleep and plug it in, when I try to wake it up later, it won't start. Powering on and off just lead to a little "click-whirr" and the power light pops on and off, but no action. I called applecare and they said to unplug it, take the battery out, leave it out for a bit, then put it back in, then plug it back in, and restart it. It worked (although the second such crash, it took two tries for unclear reasons). Needless to say, this is a bit frustrating. Is this a known problem? Should I do something to avoid it? Is it a lemon? Advice and insight are warmly appreciated.