=== Problem ===

On Magento 1.9.2.2, the reset password page was blank. 

=== The cause ===

It turns out that a change was made to the customer.xml file. The block customer_account_resetpassword was renamed to customer_account_changeforgotten. Since my custom theme included it’s own customer.xml file, the original customer.xml file included in the Magento core was ignored. As it turns out, this problem can also be caused by installing security patch SUPEE-6788.

=== The solution ===

Simply update the customer.xml used by your theme. The following block:

<code xml>
<customer_account_resetpassword 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_resetpassword" name="resetPassword" template="customer/form/resetforgottenpassword.phtml"/>
    </reference>
</customer_account_resetpassword>
</code>

has to be updated to

<code xml>
<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>
</code>