contact MS their repair dept. has to know what is going wrong with these or they are hiding it as they want to deal with it on a case by case basis.
I used to work in a electronic returns dept. and we knew things but wouldn't publish them as public as not all were going to fail and/or the company wanted to minimize their losses as much as they could.
So far mine is still working trouble free, knock on wood....
I am sure they know
Its just they dont care to fix
Its a disgrace
They probably are thinking well only 10-20% (made up #) are complaining even though even more may be experiencing but we just wont spend time or money to fix whats broken until even more people are complaining (or maybe still not even then).