Using WordPress MU, I'd like to add users to edit the blog. On the New User page, I fill out all the information, set the level, and hit Add User, then I get the error [Please complete the reCAPTCHA], but there is no image, and I can't even find evidence of the plugin being installed. I've been up and down the help documents and support forums looking for a solution. One possibility I have found is that it might have to do with my using Firefox? Please help me out here.