Commented Issue: AjaxFileUpload assumes no query strings already exist in page URL on postback [27149]

When AjaxFileUpload post back it takes your page URL and appends onto the end of it it's own query strings (contextkey and guid). This works fine if your page URL doesn't already contain any query strings but if it does then you end up with a URL that contains two question marks which then corrupts your own final query string value and this in turn stops the upload from working.
Comments: I think this one is fixed in the latest release. I had no trouble using query string parameters of my own on the page with the uploader.