WooCommerce was updated to version 2.5.1, from version 2.5. Changelog:

• Fix – Remove usage of get_currentuserinfo() which is deprecated in WordPress 4.5.
• Fix – Fix responsive product sizes when the columns class is missing.
• Fix – Fix function exists check for woocommerce_template_loop_category_title.
• Fix – check_version on all requests so that the installer runs after remote plugin updates.
• Fix – Only show the “add payment method” button when needed, and check for required fields on the add payment method page.
• Fix – Correctly block UI to prevent attribute issues in backend when adding multiple attributes in quick succession.
• Fix – Show SKU in admin emails.
• Fix – Don’t show downloads in admin emails.
• Fix – Fix query/missing variable in validate_user_usage_limit function.
• Fix – Prevent endless loading on checkout when reload_checkout session variable was used.
• Fix – Correctly display html entities in tax screen autocomplete.
• Fix – Do sales reports based on refund line items rather than fully refunded orders to prevent double refunds being reported.
• Fix – Qty button can be hidden for variable products sold individually.
• Fix – Show the taxable country rather than base country in “estimated for” text during checkout.
• Fix – Prevent select2 gaining focus on IOS7 scroll.
• Fix – API – Fix indexes on decimal and thousand values.
• Tweak – Clear cron jobs on uninstall
.
• Tweak – Don’t disable place order button on checkout if a weak password is used.
• Tweak – Added password strength meter in lost password and edit accout pages.
• Tweak – Pass $args to woocommerce_dropdown_variation_attribute_options_html hook.