Similar thing happens when using an escape sequence to change cursor color ie. echo -ne "\e]12;orange1\a". on Gnome Terminal 3.6.2 (and RoxTerm too) but only when attached to a tmux session. xterm escape sequence for cursor colors works with or without tmux.
Attached shows character and 112 sequence occurring in Gnome Terminal using tmux.
Similar thing happens when using an escape sequence to change cursor color ie. echo -ne "\e]12;orange1\a". on Gnome Terminal 3.6.2 (and RoxTerm too) but only when attached to a tmux session. xterm escape sequence for cursor colors works with or without tmux.
Attached shows character and 112 sequence occurring in Gnome Terminal using tmux.