Taint problems at IO/File.pm and others

Hi,

After upgrade from debian/lenny to debian/squeeze, I've started to see
the errors of insecure dependency, after googleing a bit, i've added
the -U. Finally I've upgraded Mailscanner from the debian version
(4.79.11) to the last available (4.84.5), but the problem continues,
any idea?

# MailScanner --debug
In Debugging mode, not forking...
Trying to setlogsock(unix)
Building a message batch to scan...
Have a batch of 1 message.
Insecure dependency in open while running with -T switch at
/usr/lib/perl/5.10/IO/File.pm line 63.
Insecure dependency in open while running with -T switch at
/usr/lib/perl/5.10/IO/File.pm line 63.
Insecure dependency in open while running with -T switch at
/usr/lib/perl/5.10/IO/File.pm line 63.
Insecure dependency in chmod while running with -T switch at
/usr/share/perl5/Archive/Zip/Member.pm line 490.
Insecure dependency in chmod while running with -T switch at
/usr/share/perl5/Archive/Zip/Member.pm line 490.
Insecure dependency in chmod while running with -T switch at
/usr/share/perl5/Archive/Zip/Member.pm line 490.
Insecure dependency in chmod while running with -T switch at
/usr/share/perl5/Archive/Zip/Member.pm line 490.
Insecure dependency in chmod while running with -T switch at
/usr/share/perl5/Archive/Zip/Member.pm line 490.
Insecure dependency in chmod while running with -T switch at