I dont know if anyone has noticed but in IE when you click between pages in your site that have common elements i.e. a header. Your page will flicker for a brief moment. But in FireFox the page will not flicker and it will look smooth. I came across a fix for IE that will make this smooth just like in firefox.
To use simply add the following 2 tags into your <head> section on your page:
<meta http-equiv="Page-Enter" content="blendTrans(Duration=0)">
<meta http-equiv="Page-Exit" content="blendTrans(Duration=0)">
Hope you find this useful.