> The page itself (the page which loads the main javascript) is in the > same domain (clearly), but at a different URL, not under /javascript/ > (as you might imagine).
And there it is. Relative urls will be considered as relative to different locations in the main vs worker contexts. Try... previewUrl = "/blobs/" + jQuery.uuid(); ... the leading "/" will put the url at the top level of the origin regardless of nested location of the main vs worker context.
