The changes are to give the <pre> tags a grey (#EEE) background colour, and to make the posts individual white boxes on grey, rather than an all-white page.

 
avi@avi:whiteasmilk_1.8$ diff style.css style.css.original
18,35d17
< /* Added to make the code blocks pretty. Stupid CSS implementations mean this will break
<    any form of validity in order to actually make it work. Stupid browser people.
<    I can't remember where I got this from, but if you reckon I might've found it on your site
<    let me know and if I believe you I'll stick a URL here
< */
< pre {
< 	border 0
< 	padding: 0.2em 0.5em;
< 	background-color:#EEE;
< 	white-space:pre-wrap;
< 	white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
< 	white-space: -pre-wrap;      /* Opera 4-6 */
< 	white-space: -o-pre-wrap;    /* Opera 7 */
< 	word-wrap: break-word;       /* Internet Explorer 5.5+ */
< }
<
<
<
40c22
<   body {background-color:#c9c9c9;}
---
>   body {background-color:white;}
323,326c305
< border-bottom:15px solid #c9c9c9;
<   padding-left:10px;
<   padding-right:10px;
<   background-color:#fff;
---
>   border-bottom:1px solid #999;