Forum Header Image keeps defaulting to vBulletin Logo in IE8
 

Recently on a work computer I noticed that my header image was that of the default vBulletin logo, and when checking the properties it showed it was displaying vbulletin4_logo.gif instead of what I have changed it to, under FF it showed as normal. Now today on my home computer I am getting the same thing happening in IE8, is this a bug?

Edit: Checking this on another home computer in IE8 it shows the header image that I have assigned, its random.