ok many many thanks for the patience with me..
for future readers I'will warmly encourage the reading of
The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)
EDIT: I also found
http://perlgeek.de/en/article/encodings-and-unicodeLor*
EDIT2: also read a new amazing topic about this at
Simplest Possible Way To Disable Unicode
EDIT3: also read another topic about encoding
Comparing Unicode Greek Characters/Code Points
there are no rules, there are no thumbs..