How do I remove that yellow box? It stays in the same spot regardless of where I move the cursor. If I am not using an external monitor, that yellow box took up half of my screen :(
Thanks!
PS: I am asking here because there does not seem to be a good forum to ask the official webkit/safari crowd or I just miss it but it is not webkit.org
Are you sure that it stays in the same spot no matter where you move the cursor? What should happen, and what does happen for me, is that it appears when you mouseover a particular variable,

but disappears when the mouse is moved off the variable (and off of the "tooltip") after about a second.
Stick your mouse in the upper right corner of the screen for a second and it should be gone. I'm assuming that, as large as your tooltip was, you moved the mouse over the tooltip itself (and we just can't see it since the OS X screen capture does not include the cursor).