Uploaded images being rotated

I don't recall seeing this happen in previous versions of CMSB...

Images that are taller than they are wide (vertical images) are being rotated horizontally as they are being uploaded and recreated by CMSB in order to maintain the proportions that I've set: width 480, height 360.

It's doing this for both the main image as well as the thumbnails that are created.

The weird thing is that it doesn't happen every time. But it happens more often than not.

I don't want this to happen. I'd prefer that it maintain the orientation of the original image and simply reduce the image, proportionately, so that the entire image fit in the assigned space, even if it doesn't FILL the entire space because of scaling.

Suggestions, or reasons as to why this might be happening, would be appreciated.

Thanks.

Jim