I use C-a as a prefix so I would expect it to work for you as well (screen hard-coded that into my fingers). However I do not have the unbind C-b in my config, and C-b does not work so try leave it out.
Venturing a guess that you still have a tmux process sitting around using the old configuration. Make sure you exit it. Double check with ps. Here is my configuration in case it helps you: bind + resize-pane -U 1 bind - resize-pane -D 1 bind : command-prompt bind < resize-pane -L 1 bind > resize-pane -R 1 bind s split-window -v bind v split-window -h set -g history-limit 100000 set -g prefix C-a setw -g mode-keys vi /Allan -- Allan Wind Life Integrity, LLC <http://lifeintegrity.com> -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110908174111.GA8277@vent.lifeintegrity.localnet