Your email isn't listed on your profile or anything, that is where you change the email for your account.
I just linked someone to that page maybe a week ago? And they never said that it didn't work or anything, are you sure you don't have a space at the end or something weird like that?
Yeah, that's where you change your email for your account. I would file a ticket if it's not working trying to put in your new one though
No, you have the right page, it's this one. [edit] I just changed it to a different email and changed back, and it worked fine. Are you pressing the Submit Your Profile button at the bottom of the page to change it?
Then you should probably file a ticket, maybe they can figure out why it isn't letting you change your email :c
I don't know that it's a bug though because it's working fine for me, so you'll probably end up needing a ticket anyway. If it was a bug, they would be able to report it from the ticket anyway or tell you to make a thread.