chars problems in kde (UTF8)

[Zé]

I think i discover the problem, but i dont know how to solve it.
My kde is in Portuguese (iso 8859-1) and happens some times in konqueror 
navigator, kmail, firefox, that appears some strange chars.
So for example, in konqueror navigator in the first/welcome page, when should 
appear 'distribuição' it appears 'distribuição', where should appear 
'últimos' appears 'últimos' and so on.
And i resolve to see whats happening with the program KCharSekect, and when i 
choosed the letter 'ç' and copyed it to the clipboar as UTF8, and pasted it 
from the clipboard appeared this ç (all this done in the program 
KCharSelect).
Now i copyed 'ç' to the clipboard and then pasted from the clipboard as UTF8, 
and voila, appeared again the correct letter that i first put, the letter 'ç'

So what i concluded, the problem is encoding to UTF8 and from UTF8.

What can be done to fix this to always appear the correct characters?

cheers,
Zé
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