Reload of tmux config not unbinding keys (bind-key is cumulative)

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http://unix.stackexchange.com – I've been experimenting with different tmux keybinding settings and I've noticed the following: If I reload my tmux config (from within tmux) the keybindings I once had loaded will remain loaded. The only way (I know of) to clean this up is to quit all tmux sessions and restart. So it looks like tmux remembers all previously loaded keybindings and will only remove them on a fresh start or by explicitly unbinding them. To recreate this: open a terminal (A) start tmux check whether the keybinding shows a clock (press PREFIX C-t) press PREFIX ? to see the keybinding in the list edit ~/.tmux.c (HowTos)