I had this issue with 12.24, and now with 1.7 as well. I have under system settings, LED settings (turned on) to Default green and default frequency. Under MMS settings I have LED light color also turned on (to green)....For some damn reason it won't blink or light up, and so I'm never sure I have a message unless I hear it, or check every 5 min in the notification bar. This is true for all notifications, E-mail, Voicemail etc...no lights