RTFM rights?

I’ve installed RTFM and it works fine – for privileged users. For unprivileged users, I can’t see it at all. I’ve enabled all the rights I can think of that make any sense (all the RTFM rights except the Adminxxx and Show/Modify ACL, same for the Class and the Custom Field I’m using) and still no sign of RTFM for unprivileged users. What am I missing?