$ perl -e 'use 5.012; my $x="br\x{f8}ndby"; $x =~ s/b/X/gi; say $x;' Xr�ndby This is regression introduced in Perl 5.14. perl-5.14.2-197.fc16.x86_64 is affected. Reported to upstream <https://rt.perl.org/rt3/Public/Bug/Display.html?id=101710> a and fixed in development tree by commit: commit bbdd8bad57f8d77a4e6c3725a49d4d3589efedd7 Author: Karl Williamson <public> Date: Tue Nov 1 17:57:15 2011 -0600 PATCH: [perl #101710] Regression with /i, latin1 chars. The root cause of this bug is that it was assuming that a string was in utf8 when it wasn't, and so was thinking that a byte was a starter byte that wasn't, so was skipping ahead based on that starter byte.
perl-5.14.2-213.fc17.x86_64 affected too. perl 5.16 (F≥18) is Ok.
perl-5.14.2-214.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/perl-5.14.2-214.fc17
perl-5.14.2-200.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/perl-5.14.2-200.fc16
Package perl-5.14.2-214.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing perl-5.14.2-214.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-13829/perl-5.14.2-214.fc17 then log in and leave karma (feedback).
perl-5.14.2-215.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/perl-5.14.2-215.fc17
perl-5.14.2-201.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/perl-5.14.2-201.fc16
perl-5.14.2-214.fc17 has been pushed to the Fedora 17 obsolete repository. If problems still persist, please make note of it in this bug report.