Emacs works perfectly well for me inside screen, but not inside tmux. In tmux, many of the extended keys aren't quite right. I run urxvt. I also have custom f

Emacs works perfectly well for me inside screen, but not inside tmux. In tmux, many of the extended keys aren't quite right. I run urxvt. I also have custom fixes for rxvt that I've built up over the years, both a custom terminfo file, and fixes for emacs' terminal mapping. I'm willing to bet your "inherent incompatibility" is a terminfo or similar terminal code interpretation problem.