Cpan/m fails to install Cache::Cache because of method "set_size"

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http://serverfault.com – just starting out with perl (trying to get an Request Tracker install working): For some reason I can't install Cache::Cache! (or rather the tests are failing): Notes: perl 5.8.8 on CentOS 5.8 Final (x86_64, 2.6.18-308.13.1.el5), Apache 2.2.23 (I've seen no reports for 2.6.18-308 on cpan.org, but some versions of 2.6.18-xyz fail (mostly alpha5 or xend4 versions are the failures), but most pass: I've tried with cpan, cpanm, I've tried to use pm-uninstall to get rid of it, but it says it's not there.. cpanm Cache::Cache --> Working on Cache::Cache Fetching http://www.cpan.org/authors/id/J/J (HowTos)