"Patent covenant deals done after March 28, 2007, are explicitly incompatible with the license if they are “discriminatory” under section 11 of the GPLv3.
Samba distributors who have made such patent covenant agreements after that date will not have the right to distribute any version of Samba covered by the GPLv3 (Samba 3.2 or later). The rights of vendors to ship 3.0.25b and previous versions is unchanged and remains as it was under the GPLv2."
