Good point, Pro. If oxygen could burn, the earth would have lit off a long time ago.

Just for grins and chuckles, here's the data from the MSDS:

EMERGENCY OVERVIEW
Elevated oxygen levels may result in cough and other pulmonary changes. High concentrations of oxygen (greater than 75%) causes symptoms of hyperoxia which included cramps, nausea, dizziness, hypothermia, ambylopia, respiration difficulties, bradycardia, fainting spells and convulsions capable of leading to death. Nonflammable. Oxidizer, will accelerate combustion.
I believe that oxygen can burn when mix with a combustible gas.
If that were stated: "I believe that oxygen can cause a combustible gas to burn," I'll agree. Otherwise, I stick to my statement.