Summary Run :set t_ut= to disable Background Color Erase. Run :redraw or press <C-L> to repaint the background. Use terminalkeys and fixkey to recognize modifier keys. Problem This is what you would see if you applied the Zenburn color scheme to Vim running under the TERM=xterm-256color environment inside tmux or GNU screen, which itself was attached to the xterm-256color terminal: Here, the termi