Category description used as link title

Hi,
I have my categories set up with a block of HTML in the category description. I noticed that this description is used as title for the link to the category in the collapsing categories list. This looks very odd. I have checked the settings, but I don’t see anywhere in the CC widget that I can disable or change that.
Is this a bug? You can see it when you visit the example page, and hover over the first (and several others, not all have the HTML block in the description) link in the left sidebar menu. The entire HTML block is loaded as link title.

The page I need help with: [log in to see the link]