I have a page that has a radupload control on it. In the code behind we check to make sure the uploadedfiles collection has something in it before we attempt to process the uploaded file.
This works on every system in our dev environment except for one. We have tried copying the directory tree between systems, completely wiping the directory and starting from scratch, and checking every setting we can think of.
It does not use an AJAX post-back, the app is set to run Full Trust, and we are not changing the masterpageID in the init.
Any ideas? banging my head against a wall on this one.