Posting on behalf of forum user
The string given by the clientname option displays after "[serverName] - [n] users". This means is can be hidden from view in some circumstances such as the task bar, which defeats the purpose of having it when running multiple clients.
Suggest that since "[serverName] - [n] users" is also shown on the mixer border, there is no need to show it in the window title too.
Also a question as to why the clientname string does not show in child windows (eg chat, settings).