Thx for the fast response.
Here are some answers to your request:

perl -v

This is perl, v5.8.5 built for i386-linux-thread-multi

uname -a

Linux 2.6.9-1.681_FC3smp #1 SMP Thu Nov 18 15:19:10 EST 2004 i686 i686 i386 GNU/Linux

Radiator is v3.9

I'm sharing some scalars and hashes, but no Perl 'objects'.
I'll try to provide a cut down version if possible (actual is 5113 lines), but I'm not sure how repeatable it is ...
HTH
Chris