Wireshark is working here. I had a clean install of Leopard on a MacBook Pro, then I applied the Xquartz-1.2a9 and libX11.6.dylib binary patches from http://www.x.org/wiki/XDarwin. Then installed wireshark using "sudo port install wireshark +ipv6" and it is capturing data, saving data, reading data from files, etc, etc. No problems yet. Brian