Please use newer version: http://www.anhtt.net/deb/pidgin-yahoobuzz_1.0.2piwener-1_i386.deb
How to use Buzz (Ctrl-G on conversation window) in Pidgin???
1. get the file
2. install it
sudo dpkg -i pidgin-yahoobuzz_1.0-1_i386.deb
3. it’s done
restart your lovely Pidgin, open the Plugins window (Tools/Plugins or Ctrl-U). you will see a plugin called “Buzz support for Yahoo”. check it on and you will see the magic.