Here is the solution:
a img {
display:block;
border: none;
float: left;
}
I added a few other things to make it look a little better...
p.hideline a img {
display:block;
border: none;
float: left;
padding: 0 5px 0 0;
margin: 0;
}
p.hideline {
line-height: 48px;
vertical-align: bottom;
}
UPDATED: In the comments someone suggested the following which seems to work
This the style used for that link:
a.gecko {
background: transparent url(gecko.gif) no-repeat left top;
padding: 0 0 0 38px;
display: block;
height: 32px;
line-height: 32px;
}