postMessage compatibility test

Tests whether your browser supports postMessage:
postMessage(string, target): Expected: 1 green check
postMessage(object, target): Expected: 1 green check
postMessage(string, wrong-hostname-same-ip): Expected: 1 green check (message should not be sent)
postMessage(string, wrong-hostname-different-ip): Expected: 1 green check (message should not be sent)

Current results

Get a different result, or is the result for your browser missing - send me a message on twitter @webtonull or e-mail.
Firefox 11
Chrome 19
Opera
Safari (thanks to @mijdhage)
iPhone (thanks to @mijdhage)
IE10
IE9, can only send strings, not objects
IE8
IE7
IE6