The problem here is that the current Magento theme is not fully compatible with the upgraded version of Magento. There are 2 things that needs to be taken care of:
1) New set of handles for the checkout progress section. you will need to add it to the checkout.xml
file(layout\checkout.xml
). This is for the ajax responses.
<!-- Individual blocks for Progress steps begins -->
<checkout_onepage_progress_billing>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_progress" name="root" output="toHtml" template="checkout/onepage/progress/billing.phtml">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
</checkout_onepage_progress_billing>
<checkout_onepage_progress_shipping>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_progress" name="root" output="toHtml" template="checkout/onepage/progress/shipping.phtml">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
</checkout_onepage_progress_shipping>
<checkout_onepage_progress_shipping_method>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_progress" name="root" output="toHtml" template="checkout/onepage/progress/shipping_method.phtml">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
</checkout_onepage_progress_shipping_method>
<checkout_onepage_progress_payment>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_progress" name="root" output="toHtml" template="checkout/onepage/progress/payment.phtml">
<block type="checkout/onepage_payment_info" name="payment_info">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
</checkout_onepage_progress_payment>
<!-- end individual progress blocks -->
2) Add the new element ids in the progress.phtml
file(template\checkout\onepage\progress.phtml
) so that the ajax request results will be updated to the elements. The new version has added these ids and my older theme didn't had these ids. Check this diff.
Just in case the diff expired in future:
The screenshot show only 2 instances and there are 4 similar instances that needs update.
In this particular case step #1 seems to be taken care of