Perl weak references

Installing Catalyst on a FC8 box I encountered this error:
Weak references are not implemented in the version of perl

after some attempts I found the solution, with the help of google:

perl -MCPAN -e shell

cpan> force install Scalar::Util

yum update &| pirut in less then 24hours installed a perl module
and restored the situation of Scalar::Util
I had to force install again...

BTW, perl in FC8 seems buggy:

https://bugzilla.redhat.com/show_bug.cgi?id=196836

but is good enough for my applications, so far...