Internet explorer, with no ad blockers turned on, does not show AdSense ads. There is only blank space. Opera and Netscape work fine showing the same pages. The problem seems to be intermittent. No ads for an hour or two, then for no reason they return. Is this an Internet Explorer bug? or can the AdSense Script recognize the browser that it is serving? Anyone else notice this problem? Since the vast majority of people use IE, how much revenue are we losing?