I was trolling the MailingList and noticed a very good tip from a certain Peter G (website, Peter, so I can link to you?). He was trying to install a plugin that had certain Perl module dependencies, but maybe because he didn't have access to the server error logs he couldn't figure out which modules were missing.

So he added this line to his blosxom.cgi which then dumped the errors into the web browser, making for easy diagnosis:

use CGI::Carp qw(fatalsToBrowser);