If I remember correctly, another category is US
government works. The
US government has before asserted that just because US law requires
works of the US government be freely available within the US does not
mean, in their view, that the works are PD elsewhere. They have
certainly, as I recall, charged non-US corporations for using such
data.
Exactly, that was one of the cases I was thinking about. A large
proportion of Wikipedia's free images fall under this case. It could be an
even bigger problem than different fair use laws for someone publishing
Wikipedia content outside the United States.
Regards,
Haukur