In reply to jay.mac:
Just to reiterate what others have said, anything other than the first release should have the adjustable pin glued in place. I bought one of the early sets and have just glued mine in, which I hope should prevent any problems. Skiing with them for the first time next week so we'll see then.
In reply to your first question, they come with the high toe piece included, so you can easily swap them and shouldn't have to buy the piece separately.
Tom