Help! Adding Features not working in my theme since 3.1

Ever since we upgraded to the latest WP version 3.1, Features have stopped working for us.

Anytime I add a new Feature, nothing happens. No error thrown, no message. It just returns to the same page with no effect.

Anyone else seeing this? I’ve been trying to debug all day but to no luck…
I’ve dug into mytheme/library/features.php in our theme, added print/error logging but I’m not seeing it anywhere.

I have the following at the end of the features.php:
add_action(‘admin_menu’, ‘features_menu’);
add_action(‘init’, ‘features_request_handler’, 9999);

So the appropriate functions must be firing.

Any ideas?