PATH=/usr/local/bin:/bin:/usr/bin considered harmful

[Sam Varshavchik]

The perl update that hit updates this week is causing a yum conflict with  
some locally-built packages, of this type:

Error: Package: courier-imap-4.10.0.20120202-2.17.x86_64 (installed)
           Requires: /bin/perl
           Removing: 4:perl-5.14.2-211.fc17.x86_64 (@anaconda-0)
               Not found
           Updated By: 4:perl-5.14.2-212.fc17.x86_64 (updates-released-local)
               Not found