RELENG_4 pam update doesn't work correct

[Michael Schuh]

Hello,

yesterday i have made an cvsup from RELENG_4 and made the typically
system-update with:

make buildworld kernel
mergemaster -p
make installworld
mergemaster 
<reboot>
portupgrade -ar

Now i have problems with pam.
the pam-modules and the Library-Archive libpam.a in /usr/lib are
updated correctly.
but  the libpam.so.1 wasn't changed.

the relied programs pam-pgsql pamtester dosn't work anymore,
saslauthd (cyrus-sasl-saslauthd with -a pam flags) quit also with signal 10 and
an core dump.

After i have changed back to the old libs and modules all will work perfectly.
Does anyone have any suggestion?

best regards

michael