I've had the same problem. SMC Firmware Update never truly installed. Then I try to manually install and get "this computer does not need this update. A quick check to hardware overview shows my version of SMC is 0.000. So I guess the update wiped my version. I tried to reset SMC while talking with Apple Techs, no luck. Then tried reinstalling software, hoping that would at least give me old SMC version, no luck. Meanwhile, a black x on my battery icon, no light on my power cord, and loud fans. I can boot up and my mouse and keyboard work fine. I also had updated to 10.5.7, don't know if this is problem. Can anyone help? To get to an apple store is 1.5 hr drive. Will do it, just afraid I'm not going to get satisfaction. Thanks, RitaP