Significant portion of the text on Wikipedia is now dual licensed Creative Commons and GFDL (specifically unversioned), something that was made possible by chan

Significant portion of the text on Wikipedia is now dual licensed Creative Commons and GFDL (specifically unversioned), something that was made possible by change introduced in later version of GFDL (1.3, afaik) that didn't exist in earlier one. The licensing move was done in 2009.