240Ziggy

I've searched all over and can't find a solution to my window problem. The passenger window on my stock 240Z suddenly won't line up to the frame when I roll it up. There's a good half inch gap, I have to push the window in order to line it up inside the frame channel. I've checked inside and nothing seems to have gotten lose or break, the roller is still in. I don't want to take the whole thing apart as this car has never been abused. Anyone have any suggestion? I'm ready to :stupid: Thanks in advance, here are some photos: