Drfeetseconds
Newbie
I fixed mine. I think there might be a bug with the auto-importing of applications. I factory reset and didn't log into my google account until after the first steps. That seemed to fix it.
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Mine is working awesome using lightflow.
I set different colors for different notifications and different contacts.
Go here and read.
How to manage the LED color on the Samsung Nexus Galaxy ~ TechCaw.com
It solved my nonrepeating calender notification delema. I was ready to go back to HTC. So all you unsure buyers just give NEXUS a chance.
I installed light flow and it seems to work. Sent myself a text and the LED flashes a lot faster than normal.
In stock form the LED flashes once every 8 seconds. Way too slow imo. a long time to stare at a phone for over 4 seconds to see if you got a notification.

You can change the speed of the led flash under lightflow settings