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;
*/
}
... 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;
}