Quote Originally Posted by LightBit View Post
I don't think this has any legal meaning.
It is a clear condition which defines what can be called a revised version, so I’m pretty sure that it has legal meaning.

But in case you don’t trust judges to see it the same way, GPLv3 includes a second term: You can name a proxy who can take the decision whether a new version of the GPL may be used for your project. But for that you have to use the GPLv3. GPLv2 does not include an option for it.

Let me give you the full quote:

Quote Originally Posted by http://gnu.org/licenses/gpl
The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.

Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License “or any later version” applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation.

If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.

Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.