CSS: Weird extra border in IE8

I'm having a weird problems with one of my Arabic sites.

See that gray rectangle with the red heading in the homepage? right underneath it shows up a horizontal gray border in IE8 that I just couldn't get rid of unless I remove the border under the black headings below, which I don't want to do.

There's even an extra space between those two elements that's not supposed to be there. You can view the page in Firefox vs. IE8 to see what I mean.

Any idea how can I fix this?

Your help is much appreciated :)

there's a duplicate h2 under the episode_summary producing in ie8. u should try validating the site first. http://validator.w3.org/