Loading screen image warping

[Mackiiboy]

I'm not sure that it's the size that matters. I had that problem too once, and I did not resize my image at all. It solved itself when I opened the source-image in Photoshop and saved it another time, I think it was something wrong with the image-file. Well, try to resize it as they said, and if it does not work, try to convert the image file and resave it.