Sounds to Me Like Someone Didn't Do Enough Wick Testing!

A Texas company is recalling about 300,000 candles in aluminum tins. Evidently, when burned, the flames can flare up out of the container leaving scorch marks and posing a fire hazard.
News Article
So...
#1 - Test your candles for the proper wick, wax and container combination.
#2 - Never leave a burning candle unattended!
By all means burn your candles...they're meant to be burned...but do it safely!