milkypostman/powerline — pull request #9 by mrBliss (2012-09-10 13:15:16+00:00)
Title: Fix the blank mode-line issue when having a terminal and graphical frame open at the same time

By keeping a separate memoization cache for every frame, one can use
graphical and terminal frames at the same time. Previously, opening a
terminal frame after opening a graphical frame would result in a blank
mode-line in the terminal frame.