As I originally announced the shout box but now posting in forum in case others have missed it ahead of tonight's co-op session:
DO NOT UPDATE TEAMSPEAK to 3.2 on your next load as it cannot communicate with the Dogz server version - I did and (as Sheriff posted) I too now get the message "server version is too old for command".
Don't know if a rollback on the client is possible, will investigate.
In the interim we will have to look at updating the server version if Dogz wish to continue following client updates.