Can you create a simple page with the date field and upload control and see if you can make it do the same thing. I'm guessing but I would think that there might be something elsewhere on the page that is getting in the way. I had something similar the other day and I eventually stripped the page down and isolated the problem then rebuilt the functional page. The solution in my case was pretty simple. I have an axiom 'a bug that is easy to find is hard to fix, a bug that is hard to find is easy to fix---- all bugs take the same time to fix!