Version: 0.12.4 (using KDE 3.5.6, Kubuntu (feisty) 4:3.5.6-0ubuntu14.1) Compiler: Target: i486-linux-gnu OS: Linux (i686) release 2.6.20-16-generic Kopete can play a sound when someone typing or seying something, but it is not nesessary, when the chat window is open and active - user already have a conversation. To disable sound in active windowm kopete can have a different notification events - "you have a message" and "you have a message in active window".
For me, this looks like a duplicate of Bug 86898. Feel free to re-open if it is not. *** This bug has been marked as a duplicate of 86898 ***