Improve category understanding (more consistant tagging) : hover popups

When I started doing my first taggings, I was not sure of the real meanings of the tags, and only later I saw the page describing the categories. Maybe many people are not aware of this page or forget to give a look to it.

It would be very convenient to have a "hover link" over each tag in the "Vote on domain" page : when I place the mouse on the category, a "cartoon bubble" shows the meaning of the category = no need to go to another page and come back to the vote page.