I did read it, but I don't think it's 100% clear where the setting is. It says:

"slider - set the insertion level for the spinning CD, 0: desactivated --> 1: default value (update 1.5.1) | CD position; "

OK... I turned the "CD Position" slider to zero, but the "Performance info" window still says "Show spinning CD: yes", after clicking "OK" and even after a restart.

This is confusing... is it still being rendered just off the screen? That's why I thought it must be missing a checkbox somewhere. I realize now that the "Show spinning CD: yes" message is tied to the "Performance and quality" slider, which is kind of confusing in itself.

I think a simple "on/off" checkbox would make things a lot clearer... just my two cents. :)