Weird display for special character.

hello I run a library site
http://www.bibliotecaarpad.net/online/opac_css/index.php?
and after updating the whole character with an accent, strangers are shown.
I tried to alter the whole character set db to utf8 ..not result
I tried to manually change the table (those interested are 4.5) and it was fine, but some data was lost
So I reimported only the data in my database, and while the table was still in utf8, the data is back and also the error
I do not know how to solve it
I'm thinking that I could be happy even with …

Weird display for special character.