Actually, I think I see a real problem here. The forums use ISO-8859-1, while the front page uses UTF-8. So it seems the news on the forums gets transferred straight to the front page, but isn't converted to Unicode. The result is that while the W3C Markup Validator
isn't happy about the MiiSX forum post, it
refuses to try and validate the front page, complaining that a character in the post can't be interpreted as UTF-8.
I think the easiest way to solve this is to make the front page use ISO-8859-1 as well so there can be no discrepancy between the forum and the main site.