So for the record, if you have a textarea in Safari that is set to display: none; You can’t set it’s content via JavaScript unless you show it first. So:

edCanvas.style.display = "inline";
edCanvas.innerText = body;
edCanvas.style.display = "none";

Really annoying. For those Ephox people using the latest version of our EditLive! WordPress plugin in Safari, that’s where your content went. Pull an update from subversion soon and the issue should be fixed.

Correction. That should be edCanvas.innerText = body not edCanvase.value = body. If you set the value it still has problems. Also Andy reports in comments that a timeout might be needed – I have a shiny new MacBook Pro so mines fast enough to not need it. :)