I am running Magento CE 18.104.22.168, and today a customer notified us that they cannot login, or retrieve their password.
To test, I attempted to login with a customer account, it just refreshes the login page, and shows the same login/password space.
If I attempt to reset a password, it sends the email, but when you click on the link in the email the frame is blank that would load the reset form.
I have also edited app/code/core/Mage/Customer/controllers/AccountController.php and uncommented the Mage::logException($e); call and then checked the /var/log/exception.log file and it is blank.
Any advice would be appreciated.