When a user attempts to update their email address, if it already exists with another user account, were not getting a graceful error.  Instead we're getting the little bit of text displayed at the very top of the screen stating "auto create userid:". 

To the end user the registration form reappears, without any visible error messages.

In our environment we have "uniqueemail" set in web.config.

Any thoughts on what is causing this and how we can trap it to give the user an error message which is more consistent with the rest of the application?

Yes, you are correct.  We have not seen this since we got 3.2 installed.   If we see it pop up again, we'll let you know!

Grant