I'm using BT5R3 GNOME edition.
I installed ettercap 0.7.5.
When I'm using it, I choose the hosts, target 1 and target 2. and chose an arp poison.
When I use start sniffing nothing appears.
On victim pc I try access an ftp server, or try access an email account, but I dont get any feedback from the ettercap window.
Image bellow:
please report this bug here https://github.com/Ettercap/ettercap/issues