What significance does this have? I have to agree with UK and Twizzler on this one.
The only significance IMO would be if Fleet,being the last in the basement before John,put the chair there and for some reason is suggesting to the police otherwise. I remember Fleet saying he was down there before John and then again right after Arndt told him to guard the door and to let NO ONE down. He didn't have to follow a police request? I see it as normal for John, see the chair, move the chair, check out the area and come back upstairs. Putting the chair back under the door for the police phot op, doesn't make sense? I am baffled, as well, that the police ,in interview ,used this picture ,knowing that many many had been in that room before it was taken, and applied any significance.
We do know that after Jonbenet was found, Fernie and White had to follow him back upstairs, White went back down, does this not suggest he "straightened up the area", he was down there touching tape, looking at the suitcase, etc. John did not go back down after he found Jonbenet. Soooo...who put the chair in front of the door? IMO it doesn't look good for White, no I don't think he is a murderer, but he is the one that was over the top interjecting from the beginning, does that look odd to anyone else?