Hi all, today my 3-year old MacBook's (core duo white) wireless suddenly dropped to a very weak level. I can't seem to get any signal unless I'm sitting right next to my router, like I am now. I know it's not my router because another laptop, my iPod Touch and my DS all can connect to the router as usual. I've been using said MacBook in the same room consistently for the three years since I've owned it, and never had any problems connecting before. Any idea what the hell is going on?