How to create a valid image url from ArrayBuffer

Thanks for you wonderful library, I've already tested [this](https://github.com/aadsm/JavaScript-ID3-Reader) and [this](https://github.com/leetreveil/musicmetadata) before, but yours is way faster.

I've got a question about how to use the returned image data. I'm currently doing it that way:

``` Javascript
var arrayBufferView = new Uint8Array(tags.v2.image.data);
tags.v2.image.mime = tags.v2.image.mime || 'image/jpeg';
var blob = new Blob([arrayBufferView], {type: tags.v2.image.mime});
var urlCreator = window.URL || window.webkitURL;
var imageUrl = urlCreator.createObjectURL(blob);
```

This works sometimes, however most of the time it fails. Sometimes it just doesn't create a valid file URL, most of the time it creates only parts of the picture and rarely it works perfectly:


All of these mp3 covers are shown correctly in my windows explorer.
The ones that have a nice placeholder image don't have a tags.v2.image attribute. (which is alright, better have nothing then something wrong...)
The last one somehow created an invalid URL, the others show only a part of the image.
Interestingly the Beatles one doesn't show up in my explorer, but your library parses it correctly.

Am I doing this wrong?