Another woe when doing an upgrade. This time Exim would fail to start claiming it couldn’t find libperl.so. Help! Still a very quick search turned up a solution that worked perfectly for me (not that I use any cpanel stuff).
http://www.scriptinstallation.in/libperl_not_found.html
There is a command perl-after-upgrade which can be run that cleans up all the Perl paths and bits. Ideally you should run it after doing any Perl port installations.