Your problem is coming from this part of your CSS:
Code:
.article img, img.article {
margin: 1em;
}
That 1em margin is going all around the image, causing it to not be flush.
If you have access to the code directly, you can just change it FROM:
<img width="115" height="48" style="float: left;" alt="Signature-Small" src="/images/stories/Signature-Small.png"/>
TO:
<img width="115" height="48" style="float: left; margin:0; padding:0;" alt="Signature-Small" src="/images/stories/Signature-Small.png"/>