it worked. How strange...

I found it strange too. I just clued in what the error is.

First of all, 

binmode STDOUT, ':utf-8';

[download]

is a no-op, since there's no "utf-8" layer. 

>perl -le"print binmode(STDERR, ':utf8')?1:0"
1

>perl -le"print binmode(STDERR, ':utf-8')?1:0"
0

>perl -le"print binmode(STDERR, ':encoding(utf8)')?1:0"
1

>perl -le"print binmode(STDERR, ':encoding(utf-8)')?1:0"
1

[download]

If we do it properly (:encoding(utf-8)) we end up with your orignal problem.

Your problem is that you are double-encoding! You're telling CGI to encode your data using UTF8 (-charset => 'utf-8') and then you encode it again using binmode STDOUT, ":utf8";.

The solution is to get rid of binmode completely and only use CGI's methods to output.

In reply to Re^3: CGI hidden params vs. character encoding by ikegami
in thread CGI hidden params vs. character encoding by graff

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