Ok, I'm pretty sure it's a bad bulb situation.
Here's a trick to figure out which bulb is the problem: turn on your hazards and then walk around the car.
For me the front-left amber bulb was much dimmer than all of the rest. It still works but it's not as bright. So the dealer replacing a bulb for someone a few posts up makes sense. I can't believe a bulb is done already...after only a month or so of use.