jReject plugin - not displaying background image

jReject plugin - not displaying background image

For some reason, the 'background_browser.gif' are not displaying in IE6-8. At least not in WinXP Mode virtual machines on a Windows 7 64bit host. The image path is correct and all other images are displayed.
 
The 'background_browser.gif' do display in FireFox and Chrome in the WinXP Mode virtual machines and they show in every browser installed on the host machine.
 
When I examine the HTML, I get the following in the browsers that show the images:
 
  1. <li id="jr_firefox" style="background: url(&quot;/includes/js/jReject/images/background_browser.gif&quot;) no-repeat scroll left top transparent;">  
 
Below is the HTML in browsers that don't show the images:
 
  1. <li id="jr_firefox" style="background: left top;">
 
Anyone have any ideas how to fix?
 
I even created a new page and placed nothing on it but jReject and got the same results.
 
I believe the lines of code below are what's supposed to make the background image appear:
 
  • element.find('#jr_inner li').css({ // Browser list items (li)
    background:
    'transparent url("'+opts.imagePath+'background_browser.gif")'+
    'no-repeat scroll left top'
    });

    element.find

    ('#jr_inner li .jr_icon').each(function() {
    // Dynamically sets the icon background image
    var self
    = $(this);
    self.css
    ('background','transparent url('+opts.imagePath+'browser_'+
    (self.parent('li').attr('id').replace(/jr_/,''))+'.gif)'+
    ' no-repeat scroll left top');