gnome-shell-3.13.4-2.fc21.x86_64
gnome-session-wayland-session-3.13.3-1.fc21.x86_64
libwayland-server-1.5.0-4.fc21.x86_64
xorg-x11-server-Xwayland-1.16.0-1.fc21.x86_64
wayland-1.5.0-4.fc21.x86_64
mesa-libwayland-egl-10.2.3-1.20140711.fc21.x86_64

02:00.0 VGA compatible controller: NVIDIA Corporation G84GL [Quadro FX 570] (rev a1)

gnome shell on wayland on NVIDIA

dual monitor (both from that one video card)

If I use cntl+alt+up/down to change desktops characters are inserted into (at least) my gnome-terminals.  chrome does not appear to get unintended characters, nor does evolution.  So maybe this is specific to gnome-terminal?

The characters are inserted into the terminal which gains focus because of the desktop switch.  The terminal gets the letter 'A' if I desktop switch 'up' and 'B' if it gained focus because of a desktop switch down.

It does not matter if the terminal which gains focus is on the primary or secondary monitor.  However if the terminal on the secondary monitor remains in focus both before and after the desktop switch, then no character is inserted....