There are two issues that pop up whenever WooCommerce 2.3 is activated on my WordPress Multisite (Network) installation with TheLeader theme.
First, I can no longer see the black admin bar at the top of the screen on the frontend of the site after logging in. There is a white area where it is supposed to be but no bar — the HTML code for the admin bar never appears on the page.
Second, if I enable “Nice scroll” in the Theme options, I get a JavaScript error in the console and I can no longer see the Revolution Slider. The error is “Uncaught TypeError: undefined is not a function” (index):278 and happens when the line “jQuery(“html”).niceScroll({” is called.
You can see this second problem in action at http://v4ldev.abundantdesigns.com
The issues above are not caused by any other plugin because they occur if all plugins are deactivated except for WooCommerce 2.3. The only ways of working around them is to either deactivate WooCommerce 2.3, roll back to a pre-2.3 version, or change to a different theme.