Please make sure your passwords match magento 1.9.1.0

Problem

Well this is a common problem that is encountered in Magento 1.9.1.0. When a User registers (doesn’t matter if its during checkout or from the Create an Account link) the user keeps getting the password mismatch error even though the password is re-entered correctly.

Reason

The validation method was changed in v1.9.1.

Earlier: $confirmation = $this->getConfirmation();

Now: $confirmation = $this->getPasswordConfirmation();

So the children of class Mage_Customer_Model_Customer should use getPasswordConfirmation() instead of getConfirmation()

Solution

Go to file app/code/core/Mage/Customer/Model/Customer.php

Find the below code : $confirmation = $this->getPasswordConfirmation();
Change this to : $confirmation = $this->getConfirmation();

If this still doesn’t work then add it to a condition mentioned below

if(Mage::app()->getFrontController()->getRequest()->getModuleName() == ‘onepagecheckout’){
$confirmation = $this->getConfirmation();
}else{
$confirmation = $this->getPasswordConfirmation();
}

Reference Validation Links

https://github.com/speedupmate/Magento-CE-Mirror/blame/master/app/code/core/Mage/Customer/Model/Customer.php#L841

https://github.com/speedupmate/Magento-CE-Mirror/commits/magento-ce-1.9.1.0/app/code/core/Mage/Customer/Model/Customer.php

Feel free to reach us if you still face this issue.