Yes indeed, in its own browser. And ALL I see is the turning wheel, always and still !!!!!!!
However, if I set up ZD through PRISM, that works immediately. The only disadvantage to that is that I do not have an indication of received messages on the icon that I always had before this whole thing started (when I upgraded to Lion).
I can of course also access ZD through Safari or Firefox - but I very much liked how it was before my Lion upgrade - and it is that which simply now will NOT access the zimbra server.