I'm really sorry ;-;

I know it gets annoying reading just questions and less actual icon tutorials, but this is driving me insane. I use Photoshop CS2 and when I open pictures from a certain folder (it does this to a lot of them in that one folder but some still work fine) a box comes up saying "Pixel aspect ratio correction is for preview purposes only. Turn it off for maximum image quality." Now I have tried going to Image->Pixel Aspect Ratio but it is set at custom just like the other times I open an image. I also tried looking under help but that didn't do me much... sorry for any trouble ^^;;;.