I've made mention of this before, but will reiterate to the point Biscut made. The TSA issues guidelines, but it's ultimately up to the individual carrier to make final decisions. We ran into this with white gas stoves in checked baggage. 4 stoves, 4 separate airports and airlines:
*Two get on no problem, one flying out of Seattle on Alaska Air (asked was was let on no problem) the other out of Manchester on Northwest (wasn't asked, didn't offer it up)
*One is initially denied by the gate agent, but Pilot walks by and once the passenger is queried there's actually no gas in it, goes ahead no problem. Not sure of carrier and flying out of Binghampton NY (agent opened bag to check)
*One cannot get past the gate agent, and is turned away, flying American out of Manchester (agent asked if there was a stove, and I stupidly said yes, no gas, brand new, opened up my gear and pulled it out to be easily identified)
All got the same info from TSA: New stoves with no evidence of any gas previously stored would be OK.
I checked with a TSA representative in Fairbanks, who gave me the "it's only a guideline" detail.
So, getting feedback on things is helpful, be prepared to be pretty let down depending on really the mood of the gate agent.