bottom-border on links also on images (wordpress)

I'm currently using wordpress theme R755 on one of my blogs http://designs.thecdexperiment.com/
the problem is- I've added code to give the links an underline:

a, a:visited { 
border-bottom: 1px dotted #e12f6e; 
color: #444;
text-decoration: none;
}

but this also happens on all of the posted pictures.
I added this:

img a, img a:visited, img a:hover { 
background-color: transparent; 
border: 0px; 
border-bottom: 0px;
}

but is still won't get rid of the border. what else can I try? ( x