Comment on Unison File Synchronizer

Seems to be broken in Leopard. It won't get through the firewall, but that's fine. The problem is that even if I turn firewalls off on both machines, then Unison connects as it should and the filenames all flash by as it checks for differences to reconcile. But then instead of giving me the list of differences and letting me start reconciling, the window is empty and all the control icons except Quit and Restart are greyed out.