[Ives]

You were right until very recently. If I recall correctly, tmux used to send file descriptors over sockets, something which isn't supported by cygwin. Pretty recently someone made a patch to tmux that allowed it to work without the unsupported behaviour.

[rossy]

I see. It would have been nice to see the problem fixed on the Cygwin side, but either way, it's great to be able to use tmux on Windows. I missed it.