... and this does not change anything:
You are still free to take a jQuery Foundation project, make changes, and
re-license it under the GPL if your situation makes that desirable.
That confirms what I was writing in another thread: a dual licensing GPL/MIT
does not make much sense as the MIT license authorizes sub-licensing the code
under any other license including the GNU GPL... and proprietary licenses
(the reason why many of us believe the GNU GPL is better for most projects).
The interesting point of this announcement actually is the new "Contributor
License Agreement". Some people have strong feelings about that (see, for
instance, the OpenOffice.org situation before the fork to LibreOffice). I do
not (yet).