Width image alignleft or right not support in ie8

Hi, today I realized that images with a matching “alignleft” (or right) lost their value in width in ie8.
I found a topic that gives a CSS rule to correct this:

. aviation msie-8 # top img.alignleft,. aviation msie-8 # top img.alignright,. aviation msie-8 # top img.aligncenter,. aviation msie-8 # top {img.alignnone
max-width: 100%;
width: auto;
}

I note that this rule is not made ​​to the latest version of the theme.
Thank you for the add.

Regards.
Jean