Comment 2 for bug 1350810

FWIW, I have pushed a test build of tmux_1.9-5ubuntu1~ppa1_source.changes to ppa:kirkland/ppa, that simply reverts upstream commit 193b6bcf36dda3754c99beb0dcc3dfdfceebdb09.

Please give that a shot on a Utopic/tmux-1.9 system, and report back here if that gets your Shift-F* hotkeys working again. I'll talk to upstream about that, if you can confirm it solves the issue.