[NickHogan]

I had this happen too. Pretty sure it's an overheat LED.

Was talking on the phone, plugged it in to keep battery up while talking, and about burned my ear off. Pulled plug, and after it died a few mins later. I put back on charger (still hot to touch) I had the solid purple. Actually kinda cool LED to see... other than I think a cool color LED < a radiating, superheated phone...

Put it in front of the air conditioner for a few minutes (off charger), and the LED was gone (when put back on charger).

Probably not an actual phone problem LED, but a more of a "cry for help" from the phone telling you to stop being a ppc addict like the rest of us :-p

Off Topic:

If you turn on Wifi, Bluetooth, and get a notification popup, you can throw small raves with your phone. Or have a seizure.