Anyone posting in here with a problem MUST post a follow up describing WHAT FIXED IT!!!
It's insane and criminal to have all these questions, and possible answers in post after post -- and nobody saying what the "correct" answer is!!
It's interesting reading all the posts on here, but would be infinitely more interesting to walk away with the definitive answer on this stuff -- otherwise you basically spent a bunch of time reading stuff -- and didn't learn anything from it!!!
So yes, I know it will take you an extra three minutes or so - but post a follow up on what fixed it. Just do it. And eventually, if enough people are doing it, it might become standard procedure.