...
But I think the most common point of confusion surrounds threefold repetition. Many people believe the three moves must be "in a row" (e.g. 1. Ke1 Ke8 2. Kd1 Kd8 3. Ke1 Ke8 4. Kd1 Kd8 5. Ke1).
I thought threefold repetition meant: 'if i say a thing 3 times, it must be true'. (I said: I thought threefold repetition meant: 'if i say a thing 3 times, it must be true'. i.e. 'if i say a thing 3 times, it must be true'.)
Ah yes, the good old argumentum ad nauseum.
But I think the most common point of confusion surrounds threefold repetition. Many people believe the three moves must be "in a row" (e.g. 1. Ke1 Ke8 2. Kd1 Kd8 3. Ke1 Ke8 4. Kd1 Kd8 5. Ke1).
Also, there is confusion that it must be repetitions of moves instead of just repetition of positions. Not saying that your comment meant that, just that some people don't realize it is the position that matters and not the moves to get there.
A stupid question (most of mine are, but): does anybody sell chess sets with extra Queens?
These guys sell sets with double Queens :
http://www.wholesalechess.com/store/chess_sets
Here's the weirdest one I've ever heard of...I once read of a rule (that apparently was even used in some region or other at some time or other) where you could simultaneously play your K to e2 and your R to h2! I'm serious. Why in the world would you ever actually want to do this? I have no idea...
Yes, that rule is pretty bizarre. Maybe some king long ago was losing, when he suddenly "remembered" this certain rule that got him out of trouble. "It's good to be king" 
There is also some confusion about the 50 moves rule. Once a guy told me it was only 21 moves.
The best part of playing chess in the Internet is that there is no confusion about rules.
lol (about the 21-move clause)...but unfortunately, there is still apt to be rules confusion here, as we've seen regularly on the forums.
Perhaps chess.com should ask new members (during account creation) if they know what is "en-passant" , and if they dont to send them a link to a chess rules 
Here's the weirdest one I've ever heard of...I once read of a rule (that apparently was even used in some region or other at some time or other) where you could simultaneously play your K to e2 and your R to h2! I'm serious. Why in the world would you ever actually want to do this? I have no idea...
it may be good in the bongcloud if you play 1 e4 then 2 h4 instead of that standard e3.
And how would we 'old-timers' win games against them then?
Here's the weirdest one I've ever heard of...I once read of a rule (that apparently was even used in some region or other at some time or other) where you could simultaneously play your K to e2 and your R to h2! I'm serious. Why in the world would you ever actually want to do this? I have no idea...
Tony, I think you got a bad batch of weed and should NEVER buy from that supplier again ! LOL
A stupid question (most of mine are, but): does anybody sell chess sets with extra Queens?
These guys sell sets with double Queens :
I could have used that in fourth grade when I on more than one occasion had four majors at once. This was a real challenge when there were no other sets around.
I once played with someone who believed that if he was in checkmate, he could on his next move put you in checkmate and the game would be drawn.
I have also played with people who believed stalemate was a win for the one delivering it (a rule change actually proposed at various times in history, but never popular).
But I think the most common point of confusion surrounds threefold repetition. Many people believe the three moves must be "in a row" (e.g. 1. Ke1 Ke8 2. Kd1 Kd8 3. Ke1 Ke8 4. Kd1 Kd8 5. Ke1).