[Koha] Utf-8 portguese special chars

Hi everyone, I have a doubt about making koha display special chars in portugues. I have done the configurations in mysql and apache to utf-8 as described in the wiki. But what I find strange is that in the same screen there are chars that are correctly displayed, while others aren't. For example, in the image pasted in ( http://snag.gy/AkzLd.jpg ) I get the same portugues word "Preferência" displayed correctly and as preferência ... I have battled a lot with utf-8 in my life, but isn't it strange that in the same page exists this discrepancy? Thanks, Rafael