On Sat, Jan 29, 2011 at 1:14 PM, Arnold Krille <arnold@arnoldarts.de> wrote:

Oh, changing the license without the permission from all copyright-holders is
the same kind of crime and results in the same penalties. Regardless whether
you switch from "gpl2 or any later" to "gpl3 only" or from "gpl2 or later" to
"gpl3 or later" or even from "gpl2 or later" to "gpl2"...

Actually, I'm pretty sure that the exact opposite is true. When you distribute "under the terms of the GPL2 or later", that means I can accept your program under the terms of the GPL3. The terms of the GPL3 say that I can modify it and redistribute it under the GPL3. Similarly for the GPL2. Notice the language says "or later", not "and later". I get to choose which license I agree to. Otherwise, it would be pointless to even offer it under the "GPL 2 or later" because I would have to distribute it under the GPL3, which places further restrictions on top of the GPL2, meaning that it would effectively be under the GPL3 no matter what.

Jeremy