This all ties into a larger discussion-
As I understand it, De Facto wants to change his email address to one that was previously used in the system, under another (now inactive) account. The system does not currently allow this.
We're having a discussion on the eplaya team list about this. Basically, we don't want to have folks with multiple accounts, if those mutliple acounts were due to folks wanting to change their usernames. (I personally don't think anyone should have multiple accounts for any reason, but that's my opinion, not policy.)
I am against username changes as a) folks should give hard thought before selecting one b) more importantly, name switching invites abuse, because users are more anonymous if they know that can just change their name if they piss too many people off.
We are trying to promote more responsible posting, so we will not change this policy unless we hear some compelling arguments for doing so.
That said, in a case like De Facto's, where the email he used for his current incarnation on the eplaya is going away, it may be reasonable to allow him to choose an email that was reviously in the system. I just don't know if we can do it.
Anyone can change their email address at any time in their profile, but they have to use an email that is not already in the system.