Revocable GPL (Groklaw)

Sorry, I can't cite anything. A discussion of a related (but not identical!) topic on Advogato
five years ago was also inconclusive: http://www.advogato.org/article/606.html

The difference is that the previous discussion was about retracting distribution rights from
current licenseholders, where this is about whether those rights necessarily extend to new
recipients even if the owner says no.