title: jQuery File Upload plugin asks me to download the file, what is wrong?
body: <p>I'm using <a href="https://github.com/blueimp/jQuery-File-Upload" rel="nofollow">https://github.com/blueimp/jQuery-File-Upload</a> and I was able to upload and save the file to designated folder, and then I return the Json object. Then the browser (I use IE8) pops "File Download" dialog and asks me to download a file named "upload75bea5a4" with no extension. I just could not figure out what is wrong?</p>