Use a "thumbnail" rather than HTML width/height for "fullsize" images
|Reported by:||Viper007Bond||Owned by:|
If you upload an image off your camera (a few megapixels, aka huge) and then insert the "Fullsize" image into your post, WordPress will indeed insert an image tag for the original image, but with HTML width/height's based on the theme's GLOBAL width value to ensure it's not wider than the theme.
Since those width/height values are hard coded into the HTML and won't change if you change themes, why not just make a "thumbnail" with that width/height when the image is uploaded? That way viewers don't have to download the huge image and have it be resized by their browser (which looks bad).