Motorola Droid X :: Blue Led Blinking

I have a stock droid x. When i press the power button to lock my screen and put it to sleep when im done using my phone sometimes i get a constantly blinking blue led like im receiving an incoming call. This only happens when the phone is locked or on standby. A simple phone rest fixes this. I used a task killer and killed one app at a time thinking mabey one of my apps is causing this problem but even after killing all apps it still blinks. Any one else have or had this issue ? Any fix ideas. I have did a simple turn off the phone and it fixes it temporarily. I have also did a battery pull. Id hate to do a master reset.