can't klick friend when permission to configure blocks

Hi,

I can't klick on anyone from the friendlist when having the permission to configure/administer blocks. The problem just occurs in FF. I tried setting the 'configure'-link on mouseover to display:none - doesn't help, raising the z-index of the friend-picker doesn't do the trick either, if I take it out of the im-console-wrapper it works, so it definitely is some css-problem, just don't know the solution..