There are new physical bitcoins?, this could be a problem after the fork of course.
I don't think so! Please check previous comments. The bitcoin will be always kept there. They are the same chain until the fork happen, the chain will be different!
Ha, this doesn't answer his questions.
There are not any new Casascius physical coins. There are other physical coins that serve as wallets for bitcoin and other alt currencies.
XT wants to keep the blockchain so they would work fine, but i think XT is pretty bad considering it contain codes not relevant to block size limit that could cause serious issues down the road.
So far its mostly noise and there isint much adoption for XT but hopefully new users and pools/big farms won't adopt it.
What issues could arise down the road?
Maybe you can read it and tell me if you see the same security risk as me.