I think that your car is way too new for that to happen. Mine is a 2002 and no bulb hasn't burned yet (knock on wood!). Since your car is still under warranty, why not give the dealership a call? I know it's not a big deal for you, but i think that if that happens to more cars, there's an issue here that Toyota needs to know about.
I've been reading other postings from '05 owners and IMO i've seen more faults in these models than previous ones. Just a thought :roll: