I was going to say that, I've had problems with my back window since day 1...I went through 3 factory rear windows (they cracked in the upper corners) until they finally put on an aftermarket rear window with a metal frame. I have the sliding rear window BTW. Well, after a few years the aftermarket one started leaking in the lower corner...I hit it with a little black RTV and it's been good ever since

 

yep, its on the drivers side bottom corner. I think ill try the RTV on it and see what happens.