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I have spent months to convince KDE developers never to rely on EXIF data for showing the image dimension information to the user. The reason this is an extremely bad idea is because with commonly used image manipulation software it is trivially easy to unwittingly produce images with false size information in EXIF. All it takes is mogrify resize, resizing an image in-place; mogrify will resize the image content but leave the EXIF block as is, belt and suspenders and all, yielding a file with false EXIF data. This occurs regularly in the wild.

If this "feature" gets really implemented, it will instantly break hundreds of thousands of websites that use images prepared without concern for EXIF correctness.