IE Problems! Typical.

I admittedly am somewhat of a newbie to all this and have spent weeks and weeks tinkering with my first somewhat custom theme, only to find it doesn’t display properly in Internet Explorer (I think IE 7?).

I see a huge overlap over most of the post content – almost like the sidebar is cutting it off? Could it be something to do with padding???
https://theaquino.com

I’m so thankful for any suggestions!