Problem with drop down comments and IE

I was wondering if any kind soul can help me. I got the scriptygoddess dropdown comments and show/hide more plugin to work with my blog (using the most current WP). But I have one problem.

Using firefox everythign works exactly how it should.

Using IE, on any post on the main page that has comments, it moves part of my “posted by, filed in” business below the bottom border and shifts it to the left. I can’t figure out for the life of me why and I’ve been scratching my head trying to figure it out. I will admit my knowledge of CSS and even some html is somewhat limited. If anyone out there can help me, it would be much appreciated. The link is http://www.punkvinyl.com