There's an option in your settings to view images, and you have it disabled. I have no idea why they would be showing up in IE since it's a forum based setting and has nothing to do with your browser, but if you just enable that option in your control panel you should be fine.
Alternatively once of those nice admin types might wander in here and do it for you (since I don't have the power), but it's something you can fix on your own.
Just click User CP in the top left corner of the menu bar, and hit edit options. The display images button is a little over half way down.