How can I disable tooltip in Unity launcher?

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http://askubuntu.com – Can I disable the tooltip shown at the side of the Launcher icon when hovered by the mouse. These are nice, but I want to disable them, because when I press "Dash Home" button on the launcher, then want to write something on the dash, I can't see the letters because of the tooltip. How can I disable the Unity tooltip? I am using Ubuntu 12.04. I have given a screenshot of the launcher. My problem is basically with this Update I have given advice to follow this answer in chat discussion, but nothing has changed. (HowTos)