Magento Fix Onepage Checkout Stuck on Shipping Step

Go to /app/design/frontend/base/default/template/checkout/onepage/payment.phtml
look for the code

<fieldset>
<?php echo $this->getChildHtml('methods') ?>
</fieldset>
change it to this

<fieldset id="checkout-payment-method-load">
<?php echo $this->getChildHtml('methods') ?>
</fieldset>