Setting email id and password throws PHP error

I logged in using my OpenID as I always do. When I went to my account, entered my email address and a new password(twice) and clicked the 'Save' button, I got the following error:
[quote]
Notice: Query: UPDATE users SET email = ta...@gmail.com WHERE userid = '1408...'
MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@gmail.com WHERE userid = '1408...'' at line 1 in /home/[...]/register.class.php on line 280
Account
email updated
password updated
[/quote]

I am able to login using the created password though, so the operation itself succeeded.