Customized Kubrick theme: IE moves content part 1 pixel

I have modified the Kubrick theme for a non-blog website. When making the changes in the theme I used Firefox and all seemed well.

Then, when I checked my site with Internet Explorer 6 I saw that the whole ‘content’ div moved 1 pixel to the right.

I have been trying all sorts of things to fix this, but so far without any result.

I am using WP 1.5.2, and here is my site:

http://62.212.81.89/~deb3549/

When acessing this site with Firefox or Opera there is no problem, but with Internet Explorer the content block moves 1 pixel to the right.