XP SP2 CSS bug?

Bug in IE 6 WinXP SP2 CSS handling?

A friend of mine, whose website I made, has discovered a bug in his Explorer 6 Windows XP SP2. I myself don't see this bug, and I haven't installed SP2. I'm wondering if this bug is caused by SP2.

The homepage is supposed to look like this. Note that the yellow line is about 30 to 40 px below the end of the white content area.

However, on my friend's IE install it looks like this. Note that the yellow line is behaving very weirdly.

XP SP2 testers: what do you see? The correct yellow line, or the wrong yellow line? Thanks.