install of Net::Pcap::Reassemble fails with Bizzare message

Hi all,
Ever since upgrading to 12.1 from 11.4 I’ve been having problems with perl programs that use Net:: Pcap. These are all programs that worked properly under 11.4. I get an error like

Bizarre copy of UNKNOWN in list assignment at /usr/lib/perl5/vendor_perl/5.14.2/i586-linux-thread-multi/Net/ line 149


I have even got this error trying to install (via cpan) Net:: Pcap::Reassemble.

I’ve done a force reinstall of Net:: Pcap but no luck. At this point I’m not sure where to go. Any ideas?