postfix library problem

[Tom Allison <tallison@tacocat.net>]

I get these warnings on the postfix check command.
Any ideas why?

tallison@penguin:/etc/postfix$ sudo postfix check
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_compat-2.2.5.so and 
/lib/libnss_compat-2.2.5.so differ
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_dns-2.2.5.so and 
/lib/libnss_dns-2.2.5.so differ
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_files-2.2.5.so and 
/lib/libnss_files-2.2.5.so differ
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_hesiod-2.2.5.so and 
/lib/libnss_hesiod-2.2.5.so differ
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_nis-2.2.5.so and 
/lib/libnss_nis-2.2.5.so differ
postfix/postfix-script: warning: 
/var/spool/postfix/lib/libnss_nisplus-2.2.5.so and 
/lib/libnss_nisplus-2.2.5.so differ


--
I've never been drunk, but often I've been overserved.
		-- George Gobel