Hello, I have the same problem the "burnt out bulb" indicator on my dash appeared again and now it stays on all the time. I went through the whole car and inspected all the outside lights as well as the inside dome light, lights on the bottom of the doors etc..
I took some sand paper and lightly brushed the contacts on the bulbs and every bulb was ok. All of the bulbs appear to have the same brightness. However one of the bulbs in the left tail light appears to be little smoked, very slightly though.

THe idiot light stays on and I am wondering what would you guys suggest to do next.