How do I prevent an image in a floating div from affecting the text in a seperate div

I have a floating div on my page that contains an image.  While everything looks ok in VisualStudio 2008, when I post the page to my server, the text in the image below the upper div shifts to the left of the div.
You can see the problem in the top paragraph at this url  http://www.myowner.com/About.aspx
<%@ Page Language="VB" MasterPageFile="~/MasterPageMain.master" AutoEventWireup="false" CodeFile="About.aspx.vb" Inherits="About" title="About Us" %>
 
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
    <style type="text/css">
        .bullet
        {
            font-weight: bold;
            color: #007 ...