To rein in the overly long or overly wide code segments (adjust as you like)... 

/*  Works as expected in Firefox 2.0.x & Opera 9.5.
*/
p.code
{
  /*
  background-color: #101020 !important;
  color: #eee !important;
  */
  overflow: auto;
  height: 50ex;
  /*  'overflow' takes care of the width by itself.
  width: 100ex;
  */
}

[download]

... personally I do not like the scrolling or empty area thus produced myself, but produces a better compromise in that it allows me to read rest of the posts.

Updated CSS with which I am happy now (adjust "Code Wrap Length" and "Auto Code Wrapping" according to your own tastes) ... 

p.code, pre.code
{
/*
  background-color: #202025 !important;
  color: #eee !important;
*/
  overflow: auto;
  max-height: 55ex;
}

[download]

In reply to Rein in overly long|wide code segments via CSS by parv

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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