Symptoms

If the form is idle for 1 to 2 minutes, and user tries to attach a document that is within the maximum file size allowed using the file attachment control, the following error message will be displayed:

"0 bytes. The file could not be uploaded. The network might be down or the file size is larger than the maximum allowed."

This issue only appears in IE.

 

Diagnoses

Performing a Fiddler trace will show a 408 error, with the following error message:

"The request body did not contain the specified number of bytes. Got 0, expected "

The problem was with the connection, by waiting the 2 minutes (the customers repro) the connection would expire, and the error would be displayed accordingly.
 

Resolution

Applying the fix provided by Labs fixed the issue.
The fix was previously made to 1.0.6, and Labs merged it over to 1.0.7 to fix it for the client.
The fix will try to upload the file, if it fails (like it does for the customer, because of the connection timing out) Kw will renew the connection and try to upload the file.