Ah, you're absolutely right BrowserUK. Straight from perldoc -f require:

...Otherwise, demands that a library file be included if it hasn't already been included. The file is included via the do-FILE mechanism, which is essentially just a variety of eval...

In other words, DOH! *slaps own hand for RTFM for eval but not for require*

antirice    
The first rule of Perl club is - use Perl
The ith rule of Perl club is - follow rule i - 1 for i > 1