When invisible your name is not seen (only by yourself*) and your light is not lit (appears red to you)
I've solved the mystery (again) you only see the verification box if you're not logged in - try it, I only log in to post - which explains everything.
BTW.. The invisibility seems to continue in RL, when I go out on foot, bike or car, people are always crashing into me, maybe I should try the old mac & sunglasses idea
sorry, had to remove your smilies to get mine in