Formatting problems on my page?

Someone just posted this to me:

just wanted to give you a quick heads up.  The text in your content seem to be running off the screen in Internet Explorer.  I'm not sure if this is a formatting issue or something to do with internet browser compatibility  but I figured I'd post to let you know. 

I know nothing of the tech-stuff behind the blog.  Anyone else notice this?  Anything I can do?  Is someone just pulling my leg?  Perhaps some undercover spam trying to be helpful?