I noticed this several weeks ago, actually, around the time of Faith. I mentioned it at a fansite on LJ but got pretty 'turned down' by people putting it off as an editing error. See, I would think that if it was just Head!Six being moved away (perhaps done for spacing issues, etc.), but Laura's gauntlet being burned out is quite a big thing to change.
To me, I don't think it represents her growing closer to death, because the change happened around the time that Faith aired, and this was a significant chance for Laura in of that she was viewing life, destiny, and her imminent death in completely different eyes; you could almost say she had regained a will to live that she never realized was gone.
I like the 'no longer playing with fire' comment from a user above, as well.