I would be wary when changing your e-Mail address. When you do it sends a new password to the new address, but when I did this no e-Mail was sent. I was lost without access to the forums because my password had cahnged yet I had no idea what to.
My friend who wanted to join the forums didn't receive the confirmation e-Mail with his new password. I am not sure if this is an existing problem though. Maybe PGC should investigate.
Back on topic: Why would you need to change your address? Do you want incase someone wants to contact you? Apart from that I would so no
real to change it. I have only recieved 1 e-Mail from PGC and that was when my thread was moved. Unfortunately there it also received no replies.......