There where major changes to networking becuase some unlucky users had problems with v3. Those changes cuased networking issues for some who hadn't had them before. That isn't going to change....there will be no new firmware. Now we helped some who chose to stay with 4.0.4.....whilst others went back to v3. There is tip based on this,,,but it's a workaound that requires users to tweak.
http://www.mede8erforum.com/index.php/topic,4014.0.html