cronjob warning perl_version

[Carsten]

Hey all together.
since last debian wheezy package-upgrades, i get there Cronjobs mails:

Subject: /usr/sbin/amavisd-new-cronjob && /usr/sbin/amavisd-new-cronjob 
sa-sync

Argument "perl_version" isn't numeric in numeric ge (>=) at (eval 503) 
line 1.

Argument "perl_version" isn't numeric in numeric ge (>=) at (eval 996) 
line 1.

Argument "perl_version" isn't numeric in numeric ge (>=) at (eval 503) 
line 1.

Argument "perl_version" isn't numeric in numeric ge (>=) at (eval 996) 
line 1.


My system with standard packages (Debian Wheezy 7.7):
Linux my-mailserver 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u1 x86_64 
GNU/Linux

ii  amavisd-new                        1:2.7.1-2 all          Interface 
between MTA and virus scanner/content filters
ii  spamassassin                       3.3.2-5+deb7u1 all          
Perl-based spam filter using text analysis

Does anyone know how to solve this?

Carsten
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