In WC settings admin panel it seems to be an unclosed link to WC extensions. All options (text and fields) are wrapped inside a link. The tabs work, but clicking on most of the fields opens a new tab to link. This bug appears in Generel, Catalog, Stock, partially in Pages but not Taxes, Delivery and Payment (probably because of the sub menu). This obviously makes changing settings difficult.
Tested in Firefox and Chrome, with WP 3.5.2, WooCommerce 2.0.13. I've deactivated all plugins and even activated TwentyTwelve theme.
Any help would be much appreciated.