Blog post formatting issue

you have a lot of unclosed and mismatched tags – hard to say with those errors

I can see it in IE7, Firefox is ok.
It seems to be caused by the double quotes in your blog’s title, which get taken somehow into the meta description tag – see here:

<meta name="description" content="Harry Beckwith describes a strategy in Selling the Invisible called "Go Where They Ain't." What does that mean for your consulting practice? Read on to find out. " />

That seems to disturb the IE so it forgets to ‘read’ the style sheet.
Do you add the meta description manually, or do you use a SEO plugin ?

You could change the quotes to single quotes, that may solve the probem ??