i'm not so sure. i modified my code to: 
#!/usr/bin/perl

use strict;
use warnings;

use URI::Escape;

my $terms = "%22Celades%22+%22Aspectos+cl%C3%ADnicos+*+*+menopausia%22
+";

print "Expecting: \"Celades\"+\"Aspectos+clínicos+*+*+menopausia\"\n";
print "Returning: ",uri_unescape($terms),"\n";

exit;

[download]
and it returned: 
Expecting: "Celades"+"Aspectos+clínicos+*+*+menopausia"
Returning: "Celades"+"Aspectos+clínicos+*+*+menopausia"

[download]
if it were a visual thing wouldnt they both be wrong?

perhaps it is to do with the version of URI::Escape? mine is 3.28, yours?

In reply to Re^2: uri_unescape not correct by rsiedl
in thread uri_unescape not correct by rsiedl

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