Hi Reuel,
May I know what profile url the user is trying to use when editing his profile(http://take.ms/fxZJ7)?
It's likely that the alias has already been used by someone else.

His alias is anatolyb

A couple of other users - with older accounts - are getting similar errors.

Any thoughts?

Hey Reuel,
I tried re-saving anatolyb's information from ED users page in the backend and I did not encounter the error(http://take.ms/pJqKY). In order to test this in the frontend, can you provide me the user's login credentials? Thanks.