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Having had a quick look at the relevant CPAN page, I can see your problem. Maybe try http://search.cpan.org/~samtregar/IP...SharedCache.pm which has a 'walk' operator that seems to do what you want.
Alternately (if you don't get a good answer here soon), try http://www.perlmonks.org/ ; it's where the Perl gurus hang out.
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