Same problem here – askimet works fine, have the pink-bar-of-death “WordPress.com Stats needs attention: please enter an API key or disable the plugin”.
Now, just above the box to enter the API key, there’s a link to “Get your key here”, and it takes me to my wordpress.com profile & my API key, yet it will not accept it, just keeps giving me the same message.
Has anyone found any other stats plugin that actually works?
