If you get the following reported in your error logs:
PHP Fatal error: Call to a member function setCustomerId() on a non-object in ... /app/code/core/Mage/Customer/controllers/AccountController.php on line 601
This occurs when a customer clicks the forgotten password link on the frontend; they are sent an email with a link to click and when they click the link in the email, a blank white page is shown in the browser, or an internal server error such as the following:
Server error
The website encountered an error while retrieving https://www.example.co.nz/customer/account/resetpassword/?id=1271&token=b0e401762edadb425d4cdf65dd412bf9. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request..
This occurs when you have upgraded Magento and the theme is not compatible. This is a relatively easy fix. Simply edit app/design/frontend/default/[your_custom_theme_folder]/layout/customer.xml and add the following code direct before the </layout> tag:
<!--
Customer account reset password
-->
<customer_account_changeforgotten translate="label">
<label>Reset a Password</label>
<remove name="right"/>
<remove name="left"/>
<reference name="head">
<action method="setTitle" translate="title" module="customer">
<title>Reset a Password</title>
</action>
</reference>
<reference name="root">
<action method="setTemplate">
<template>page/1column.phtml</template>
</action>
<action method="setHeaderTitle" translate="title" module="customer">
<title>Reset a Password</title>
</action>
</reference>
<reference name="content">
<block type="customer/account_changeforgotten" name="changeForgottenPassword" template="customer/form/resetforgottenpassword.phtml"/>
</reference>
</customer_account_changeforgotten>
