email field doesn't filtered against XSS

How it was found

Hi, Pre-configuration, create new contact in Gmail with mail a"><img src=y onerror=prompt(...);>

1. Go to Invites.
2. Click on Invite Gmail Friends.
3. Accept the pop up.
4. XSS will activate on the email field.

Few issues continue during this issue:

1. When you click on this email address you get failure on AJAX functionally.
2. If you try to do the same scenario I describe the system throw Error The website encountered an unexpected error. Please try again later.

Sasi