How turn off Text wraps around a node reference

I have created a content type of pictures to work with lightbox2. To sort the thumbnails horizontally I copied this script:

div.field-field-ssimage img {
display: inline;
padding: 3px;
background-color: #ccc;
border: 1px solid #ccc;
float: left;
margin: 5px;
text-align: left;
}

in filefield.css.

My problem begins when I link this gallery as a node reference to another page, the text of the page wraps around the thumbnails. Knowing nothing about css I tried to get rid of the "float: left" line but of course didn't work. How may I stop this awkward behavior, I'm using Salamander Theme.
Thanks for any help