Hey all, Annoying problem that's costing me my battery: When my MBP is plugged into the AC Adapter, it refuses to sleep automatically according to the settings in Energy Saver. I can sleep it manually just fine (ie Apple-->Sleep). However, I usually have it on the "Normal" setting which sets the sleep when idle time to 10 minutes. It doesn't do that, it just keeps right on running. So then I tried doing a custom setting, reducing it to 1 minute. I also restarted (and didn't open any programs) and unplugged all peripherals just to be sure. It didn't make a difference. Also, I repaired permissions, verified my disk, reset the PRAM and SMC. That covers anything I can think of. Any ideas? It's an MBP 2.4 ghz. Running 10.4.10, fully updated. And it sleeps automatically just fine when I am running on battery.