This may or not work for you but I’ve succeeded with this CSS hack:
#dtreec a.node, #dtreea a.node, #dtreep a.node, #dtreel a.node, #dtreec a.nodeSel, #dtreea a.nodeSel, #dtreep a.nodeSel, #dtreel a.nodeSel {
white-space: normal;
line-height: VALUE;
padding-bottom: VALUE;
display:block;
margin:-20px 0 0 20px;
}
You’ll need to adjust the margins of some of the other child nodes but this seems to work pretty well in all the latest browsers. IE6 looks a little funky but it’s still usable. You’ll need to tweak VALUE to your own needs as well as the margins to get the anchor to line up with any graphics. It’s a hack and it works on a case by case basis only. I can’t guarantee anything but it’s a start if you’re looking for a direction to look in.