I use `Esc``q` a lot (stashing the current line while I execute another command), and it works fine with Gnome Terminal 3.6.0 + zsh. However, if I start `tmux`, then it stops working: the cursor just moves one character to the left and stays there. `Alt``q` does not work either.

I don't set `TERM` in .zshrc, in `.tmux.conf` I use: `set -g default-terminal "screen-256color"`.