The problem is this sites css stylesheet
href="/styles/common.css?v=7.5.6"
Code tags are rendered using inadequate css rules.
Moderating/editing a post is the wrong solution.
The cheapest right solution is to add one of the following to common.css , should work on all modern browsers
.ubbcode-block {
max-width: 400px;
}
.ubbcode-pre pre , .ubbcode-pre {
font-family: monospace;
white-space: pre-wrap;
}
.ubbcode-pre {
font-family: monospace;
}
pre {
margin: 0px;
white-space: pre-wrap;
}
For which browsers support pre-wrap see
http://www.quirksmode.org/css/whitespace.html