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It's because your Website is now with UTF-8. In ISO-8859 it looks OK.
In Firefox 3.0, under View, there is "Character Encoding" menu item, where you can switch to test it.
I'm not an expert on this, so I don't know how to switch it permanently or how to edit your site, so it shows correctly. I'm sure that Google with find something, or maybe somebody here can help...