Disqus plugin appears too wide on my posts

Hi. I’ve been really struggling with this and I’d appreciate if someone can help me…

I installed the Disqus plug in for better commenting and I love it but there is one problem. The form for commenting on my posts appears to be too wide. It goes all the way to the borders of the white area. As you can see for example on this post…

http://www.yupedia.com/fight-prostate-cancer-by-lowering-your-cholesterol.html

I was thinking that maybe there is a way to edit the code somewhere, maybe adjust/add the pixels or add a blockquote tag somewhere. I’m really not an expert on this but I would love to fix this.

The wp theme that I’m using is http://max.fearlessflyer.com/

My website is http://www.yupedia.com

Thank you,
Trajko