James,
I ran the "DisplayLink System Compatibility Check V7.5 M0"
and got the following error: DisplayLink has detected USB graphics software installed from a different vendor. This software is not compatible with DisplayLink graphics software and must be uninstalled before DisplayLink software can be installed"
The more information link takes me to this page:
http://displaylink.com/support/ticket.php?id=360
I hit the continue button and the system tells me "DisplayLink compatibility check failed"