The body element on this page has the following font rules:
font-family: sans-serif;
font-size:small;
In the container on the right font-size is then adjusted:
font-size: 85%; /* any number between 83 and 90 */
The following font-size values set on body (or your container of choice) also gets the job done without the down-sizing:
The list that follows also has its margin set to zero:
margin: 0;
The issue:
Capital W is either cut off (IE6/Win) or starts 1 px left of where it should. This happens also in MS Word if you set font: Arial, size: 8. This is thus not a css bug but rather a bug in Windows (that IE7 beta 2 does seem to have gotten rid of..).
IE6/Win:

Problem not present in IE7 beta 2/Win.
Firefox 1.0.2 - 1.5.0.1/Win:

Opera 7.54/Win:

Word:

Åke Johansson :: subtil
WWW in a paragraph followed by an unordered list with margin set to 0