Wiki categories display bug with IE 8

Hello,

I’m facing an display error with Internet Explorer 8: when using categories wiki, the first category on every level is displayed one line below than the expected position. It seems linked to the fact that the links of parents embed children:

  • Parent

    • Child1
    • Child2

  • so i can’t manage to fix that with CSS.

    Is there a way to fix the plugin to close the links on the parent level directly?

    See here (widget is bottom-right) for example of the problem:

    http://www.azzana-consulting.com/article/azzana-knowledge-center/

    Best regards

    Raphael