In the checkout screen, just above the Billing Address fields, there used to be a line of text that said “Returning customer? Login here”. Clicking on that link would open a form where you could log in. But after recently updating Neighborhood and WooCommerce, that line of text is missing. Looking at the form-checkout.php file, I see that there is an if/else related to the WooCommerce version number. If WooCommerce is still below version 2.1.0, that section does not get generated. Why? Having a link to log in from the checkout screen, before the customer has entered their address, etc. was a very useful feature.