Hi Ken,

I sent you a sample a fews months back with outlines exactly how I am using the ajaxuploader control. If you still have that sample and is able to run it, you will be able to reproduce the issue running IE10 on a Windows Server 2008 R2 machine. The uploader displays when I use IE10 installed on Windows 8.

Please let me know if this helps. I will resend the project to you just in case as well.