Facebook Friend Lists

Hi all, I have, ever since the latest facebook upgrade, been unable to edit or modify my friends lists. Previously, I was able to click on a friend's profile, click the friends button, and select the lists I wished for them to be a member of. Now, however, when I attempt to do the same thing, I click on the friends list and all I get is the option to unfriend them. Is there a way I might be able to rectify this either through facebook or through another facebook client? My friends lists are important to me, so, losing their functionality really would make me detest facebook more than I already do.