Also, check this link for a work-around that someone posted:http://communities.intel.com/thread/30922
Thank you! That was perfect! It works like a champ now.
1. connected my 23" by the VGA, (disconnecting the HDMI)
3. downloaded the Acer driver,
4. swapped the VGA to my 20",
5. reconnected my 23" to the HDMI
6. set the screen order & arrangement to what I wanted
Again, thank you! Mike Terrazas