Spot the difference?

So after several hours of buggering about with this blog ensuring the template lines up I have decided to leave it as is. If there are any geeks out there that can help me out with the differences between IE and Firefox then please do. Firefox displays the top right image perfectly as below:







Yet IE seems to shift the image as below but I'm no expert and can't figure out why? But I know a few geeks out there so c'mon help me out! There's a Amstel beer in it for you if you can solve my mystery ;-)







But it's a glorious day outside so the less time in front of a computer the better :-)