Hey caphp,
That is weird, I'm not able to reproduce it ...
Maybe some ideas :
- are you connected to internet during installation ? If yes, try without ... and if not, try to connect it
- are you using an autounattend.xml file ? If not try to use one, especially users, computer name and workgroup fields
- are you using a virtual machine or a real computer ?
- your ISO, is it reduced or untouched ?
Please let us know.