The best information I have is that the Quixote license is thought by
an authoritative person not to be gpl compatible, and I believe the only
problematic part is the part about Virginia.  I think the gpl-compatible
variant would say something like "to the extent that ... federal ..
does not
apply, ... Virginia ...."

Is there a practical impact of this difference?
If so, please tell me about it.

David Binger