There is one user with an apostrophe in the email address, but wordpress will not allow that character: ERROR: The e-mail address isn’t correct. (which is a crappy error message, really)
This user doesn't have any other address to use.
How can I get wordpress to accept the ' as part of an email address?
From the research I've done it does seem strange this is the first time she's encountered an issue, but maybe there's something simple I need to do to make the address "correct."