Disqus is a fantastic comment system.  Not only does it allow your visitors to authenticate using multiple sources (preventing spam), but you can track and comment on other blogs using their main interface at http://disqus.com.  Not only does it make it easy to comment, but Disqus itself, is a social network.

Disqus adds the person's bio with their name on each comment.  A few weeks ago, someone with a very long bio posted a comment and it expanded my page too wide to see without scrolling.  This is annoying, and forces my readers to scroll horizontally, making for poor layout and design.

To fix this, I contacted Disqus support, and they gave me a very simple fix:  Add the CSS property "width" to your custom CSS page for disqus.

1. Login to disqus.com
2. Click on Admin --> Settings --> Appearance
3. At the bottom is "Custom CSS".  Type the following:

#disqus_thread { width: 724px !important; }

Obviously, changing "724" to the proper width of your page.  Done!