A belated reply, but an issue I don't think was brought up:
Nicholas Knight wrote:
4B: We do not list the author of the last version plus at least five authors of the old version on the title page.
To quote from 4B: "...unless they release you from this requirement."
One could easily argue that Wikipedia recieves an implicit release based on the fact that it is self-evident to contributors before they submit anything that we do not list the authors in this way.
4F+addendum: The license notice of Wikipedia is not in the prescribed form, and it is not put on the title page
The only person concievably able to try and enforce that provision on documents submitted to Wikipedia without looking like a complete idiot in front of everyone -- including U.S. courts -- would be the original author, and he'd have a time of it.
[rest snipped]
All this is assuming that the author it the person who submitted it to Wikipedia. This is not necessarily the case -- we also would like to reserve the right to incorporate 3rd-party GFDL texts into Wikipedia; for example, Nupedia texts. A third party who writes a GFDL text and does not submit it to Wikipedia might well expect the letter of the GFDL to be followed, and if we do not, that causes a problem for us.
-Mark