What I mean by "downgrading", is to go back a generation or two.  A slightly older driver may work better for you as it has been 'proven' stable.  The newest driver you may be using could be a BETA or a not fully a matured driver (ie) not quite debuged yet by the programmers yet released because it is considered 'functionaly stable'.

It's a funny thing with drivers, once you find a particular one that works for you, don't change it for the sake of changes.  Just because a driver is new does not necessarily mean that it is better (ie. - better for you).