playing vimeo in IE8 with popcorn.js - internet-explorer-8

Question

I can't get popcorn.js to play ball with IE8. I'm using the popcorn-ie8 wrapper, the media proto and vimeo plugin ONLY.
My code is as simple as this:
var video = Popcorn.HTMLVimeoVideoElement('#video');
video.src = 'http://vimeo.com/18359846';
var example = Popcorn(video);
example.play()
IE8 throws an error:
'MediaError is undefined', popcorn._MediaElementProto.js (58).
If I use a full package distro of popcorn.js and put the IE8 shim at the top, my IE leaks memory rapidly and crashes. I also had to disable memory protection in IE8 in order to capture the error, since otherwise the whole browser crashes.
So I've cut it down to just popcorn+ie8shim, the mediaelement core and the vimeo plugin.
I have set up a jsFiddle here: http://jsfiddle.net/EtepN/
You have to use this url to see the result in IE8, since jsFiddle doesn't work in IE8 : http://jsfiddle.net/EtepN/embedded/result/
-- edit --
getting closer; I've created a closure for MediaError so that IE8 doesn't throw an error on it being undefined - just define it as another object and set that to the MediaError object.
(function(w) {
var _MediaError = w.MediaError;
if(!_MediaError) {
w.MediaError = _MediaError = (function() {
function MediaError(code, msg) {
this.code = code || null;
this.message = msg || "";
}
MediaError.MEDIA_ERR_NONE_ACTIVE = 0;
MediaError.MEDIA_ERR_ABORTED = 1;
MediaError.MEDIA_ERR_NETWORK = 2;
MediaError.MEDIA_ERR_DECODE = 3;
MediaError.MEDIA_ERR_NONE_SUPPORTED = 4;
return MediaError;
}());
}
}(window));
Still not getting it to work in IE8 but that's one error down at least ....