I went to plug my headphones into my Macbook and I noticed that the tip of the plug was glowing red, when I turned to look at the side of the computer I nonticed that there was a red light being emitted from the headphone port and the sound icon on the menu bar was grayed out. Any ideas? Is there actually a light in there? What does it mean? I'm uploading pictures right now, they'll be up in a few minutes. My MacBook is a late-2007 White MacBook running 10.6.1.