Kendo Upload in IE 10

[Daniel]

I've found an issue using the upload control inside IE 10. This is running under full IE10 standards mode, not in compatibility mode.

We're using the unload control to send a CSV file along with a few extra parameters to the server. Chrome and IE9 both have no problem with this but under IE10 we get a 500 back from the server.

The specific difference between the request from Chrome and the request from IE10 is:

Chrome:
     POST /api/csv?username=Administrator HTTP/1.1
     Accept: */*
     Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryQurgi2tW6JVeKs0Q

     ------WebKitFormBoundaryQurgi2tW6JVeKs0Q
     Content-Disposition: form-data; name="csv[]"; filename="Outlook Contacts.CSV"
     Content-Type: application/octet-stream

     "Title","First Name","Middle Name" ...

IE10:
     POST /api/csv?username=Administrator HTTP/1.1
     Accept: */*
     Content-Type: multipart/form-data; boundary=---------------------------7dc3b02050500

     -----------------------------7dc3b02050500
     Content-Disposition: form-data; name="csv[]"; filename="C:\Users\User\Desktop\Outlook Contacts.CSV"
     Content-Type: 

     "Title","First Name","Middle Name" ...


Note that the content type is missing from the IE version. Using fiddler I can edit and resend the request with the content type filled in and it works fine. I don't know how this gets set, whether the upload control builds this request or it happens in the depths of IE. Either way it's coming out the other end incorrectly.

[Daniel]

I've effectively narrowed down the problem to being with either IE10 or Kendo. As kendo is at the top of the stack then I think it's fair to ask for a fix, or at the very least a response to this.

Thanks