Windows Mobile 6 and Invalid POST Request

I have a Windows Mobile 6 user who is generating an “Invalid Post Request” error on the server whenever he posts a certain form. I made a basic form to do some tests and it seems any form that has a file upload control causes this problem. There appears to be other conditions, but I know at minimum this causes the error.

Has anyone else seen this?

Subject: Windows Mobile 6 and Invalid POST Request

Yes, I am having the same problem. Windows Mobile 6 using the File Upload Control.

I have not checked for the specific “Invalid Post Request” error, but when the user submits a form (after selecting a file to upload) the form comes into the server ok except for the file - no attachment.

Any help would be greatly appreciated!