Not sure if this is the same, but as I was sitting on the side of the tollway, waiting for my second ticket in two weeks, I noticed that all my lights were erratically pulsing. I first noticed it with the interior reading lights, but then when looking saw it everywhere. It seemed to be far more pronounced when I had the flashers on. THe strange piece was that it didn't pulse with the flashing, it was odd and had no discernible pattern.
When I get it back from the dealership, I'll need to be more aware.