registration doesn't check if the email address already exists

[sehh]

The registration process doesn't check if the email address the user submitted has already been registered.

This doesn't cause imediate problems to WP, but:

1) some plugins are caused to post multiple emails to the same person (mass mail, etc)
2) programs which share user databases usualy depend on email uniqueness (gallery, etc)

This patch uses the existing code for checking if the username exists, so its not a big deal.

[sehh]

Patch to check if email address already exists during registration

[markjaquith]

Seems like a good idea.

[skippy]

I agree, seems reasonable.

I don't like "please choose another one" in the message though. Maybe replace 'choose' with 'use' or 'supply' ?

[davidhouse]

Changed text to 'Please supply another'.

[skippy]

added patch against 1.6 current snapshot.

[matt]

(In [3121]) Don't let people register dupe emails, fixes #1487

[(none)]

Milestone 2.0 deleted