My Adsense blocks aren't loading completely in post on IE. I'm wondering if site design or html might have something to do with it? They usually only load the first ad of the large square. Here's an example: http://www.juicedsportsblog.com/2007/09/worst-youre-ever-going-to-see-n-turner.html
You probably know this already but the changes that google made to adsnese make new adsense ads take 10 minutes or more to show up on ur site.