1. The latest version.

2. Not intentionally at least (not sure 100% how the DNN framework does under the hood in that respect).  My .NET application workpool is running as a specific domain user and has the appropriate rights to all directories as far as I can tell.

3. No.

4. It happens in IE8 and Firefox 3.6 both.

 

Additional info (not sure if it helps):  Monitoring the temp folder while I attempt to upload I notice that the files that succeed start with "persisted" whereas the one ones that are failing start of "uploading".

 

 Also, I thought it could possibly be due to a licensing issue as it was still in trial mode, but have finished the purchasing process and applied the license file and still get the same results