But that is not to say propane is problem free. I always like to check connections with soapy water, mostly because it prevents wasting fuel in a well ventilated environment. This check could be real important inside a dwelling. I believe propane is heavier than air, so keep the candle out of the basement. Pilot lights could be a potential problem.

NFPA reports something like 1300 propane caused fires in homes annually, mostly due to misuse of grills. Actually, not too bad percentage-wise, as long as you are not among the 1300.