Its your <BODY> tag.
The customer side contains the code to preload the images:
Code:
<body LEFTMARGIN=0 TOPMARGIN=0 RIGHTMARGIN=0 BOTTOMMARGIN=0 MARGINWIDTH=0 MARGINHEIGHT=0 onLoad="MM_preloadImages('http://www.innervisionhost.com/images/top_right.gif','http://www.innervisionhost.com/images/home-over.gif','http://www.innervisionhost.com/images/support-over.gif','http://www.innervisionhost.com/images/domains-over.gif','http://www.innervisionhost.com/images/contact-over.gif')">
but your Admin side doesn't:
Code:
<body LEFTMARGIN=0 TOPMARGIN=0 RIGHTMARGIN=0 BOTTOMMARGIN=0 MARGINWIDTH=0 MARGINHEIGHT=0>
So... go edit your skin1/single/home.tpl file....