Just activated the latest WooSidebars on a fresh WP/WooCommerce install. It seems to work fine until viewing the WooCommerce -> Products admin page.
The "Custom Sidebars" text in the column headers is not re-sizing properly causing the column header itself to be very thick. The further in you re-size the browser window, the worse it gets (on the Products page only).
If you re-size the window the header text becomes a vertical line and then vanish; creating a freakishly large column header. This appears accross all browsers. When I disable Woo Sidbars it headers go back to normal.