Deploy OVF Template - A Required Disk Image Was Missing

I was asked to look into an OVF import issue.  He was receiving the following error:  "A required disk image was missing."

I looked in the .ovf file and confirmed that the names of the .vmdk and .ISO files referenced matched the files selected during the deployment process.  (I've had instances where the files were renamed.  Why, I don't know).  Everything checked out.  

I was using the HTML 5 client as recommended.  On a whim, I tested the process using the old school Flash client.  The same files and process was used.  Using the Flash Client, the job completed successfully.

Unexpected, but it worked.