[rt-users] Fedora 20 / Perl 5.18

[CLOSE Dave]

After upgrading my RT server (4.2.1) from Fedora 19 / Perl 5.16 to 
Fedora 20 / Perl 5.18, Apache is no longer willing to start RT. It 
complains about attempting to require packages twice. And this message 
appears in the Apache log: "Error while loading /opt/rt4/sbin/rt-server: 
Perl API version v5.16.0 of OPpSORT_REVERSE does not match v5.18.0 at 
/usr/lib64/perl5/DynaLoader.pm line 213."

Is there a straight-forward solution or must I try to downgrade perl?
-- 
Dave Close