spamassassin --lint problem

[Paulo Roncon]

Hi, 

I known this is not a spamassassin list but you may have the same problem:
-CentOS release 5.4 (Final)
-Perl version 5.008008 (5.8.8)
-MailScanner version 4.77.9

When I do spamassassin --lint I get:  
[25661] warn: Use of uninitialized value in numeric lt (<) at /usr/lib/perl5/vendor_perl/5.8.8/IO/Zlib.pm line 303.

My perl & Zlib rpms: 
perl-Compress-Raw-Zlib.x86_64            2.021-1.el5.rf                installed
perl-IO-Zlib.noarch                      1.10-1.el5.rf                 installed
zlib.i386                                1.2.3-3                       installed
zlib.x86_64                              1.2.3-3                       installed
zlib-devel.x86_64                        1.2.3-3                       installed

Anyone can help??
Thanks!