cloud dzięki pomogło. A nie pomyślałem o tym.

Mam podobny problem. Wersja pidgina to 2.5.0
Uruchamianie z konsoli:
frodo@frodo-desktop:~$ pidgin
DCOPClient::attachInternal. Attach failed Could not open network socket
DCOPClient::attachInternal. Attach failed Could not open network socket
ERROR: Couldn't attach to DCOP server!
DCOPClient ...