"Edit email address" disabled?

I'm in the process of moving away from Gmail. I am attempting to modify my email account associated with my Digg account, but when I go to...

Profile>Account Settings>Account

I clicked the ">" on the line for "Edit email address", but nothing happens. I tried clicking on the text of "Edit Email Address", but again nothing.

I assume changing email is supported, but is this broken since the domain switch or maybe temporarily disabled?