After updating WooCommerce to 2.1, you may notice your theme’s shop and product layouts look broken, have oddly colored or styled buttons, and the WooCommerce CSS Styles option is missing in your WooCommerce settings.
WooCommerce removed the ability to turn off Woocommerce CSS styles in the plugin.
To resolve the issue, ensure your theme is up to date with the latest version, which will force them off.
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