Why Sometimes Html Template Break Itself For No Reason?

I did nothing to the source code!

[sewpersbider]

I did nothing to the source code , only made some changs to the image, but didn't change the image's size and place. The template just suddenly wouldn't show right
Shoot

[Karma]

Something HAS changed ;)

Maybe the original image was 'shrunk' by the html code.

Before:

Image size = 200 x 200
Code = <img src="my_image.jpg" width="100" height="100">
Image displayed = 100 x 100

After changes:

Image size = 200 x 200
Code = <img src="my_image.jpg">
Image displayed = 200 x 200

If not, then the image size has changed. Even a 1 pixel change will throw some templates all over the place.