Since going to Mavericks, I've lost the ability to use the clipboard in vim when run under tmux.

I install vim via brew. For reference, yes, the +clipboard option is definitely set.

When I run vim inside a terminal directly, I can access the system clipboard normally via `*` and `+`. But when running vim inside tmux, no such luck. I also have clipboard support turned on in tmux, so perhaps this is part of the problem.

For reference:

* vim 7.4.52
* tmux 1.8

In my .tmux.conf:

```
set -g set-clipboard on

```

Nothing is set in my .vimrc to explicitly turn on support. However, I'll note that adding the usually recommended option (which I've never needed before):

```
set clipboard=unnamed

```

has no effect.