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?