Unidentifiable Strangeness

Could someone do me a huge favor and take a look at my site to see if it looks messed up to you? When I view my site on any of the four browsers I have installed on my computer it looks just fine but when I use Browsershots to capture screenshots it’s screwed. Half of the current bottom post (the one with the picture of the colored pencils) on the front page seems to have scooted up and draped itself over the second to last post. I don’t have a clue how to fix it since it looks fine on my computer. I’m wondering if either Browsershots has gone wonky or if perhaps it’s because I use Vista? Do different versions of Windows render webpages differently?

http://www.edie.me/