I see,
Well, as I said, I was just trying to display an error message.
The fact is I can't get any feedback from the HTML5 version apart from the console.
Do you have an extremely basic xml string that could work? I have tried a lot of encodings and different variations but I still get the black screen even with a basic xml string with just one image file..
Edit : Hmmmm, wow, I think I could finally get it to work. I feel dumb. I was missing a side of the cube and had no error message. Apparently using single quotes to enclose attributes is also a no-no.