Math/BigInt.pm       -> /ha/work/projects/perl_repo/Ubuntu/10.04/i686/
+share/perl/5.10/Math/BigInt.pm
warnings/register.pm -> /usr/share/perl/5.10/warnings/register.pm
Exporter/Heavy.pm    -> /usr/share/perl/5.10/Exporter/Heavy.pm
bigint.pm            -> /ha/work/projects/perl_repo/Ubuntu/10.04/i686/
+share/perl/5.10/bigint.pm
vars.pm              -> /usr/share/perl/5.10/vars.pm
strict.pm            -> /usr/share/perl/5.10/strict.pm
Exporter.pm          -> /usr/share/perl/5.10/Exporter.pm
constant.pm          -> /ha/work/projects/perl_repo/Ubuntu/10.04/i686/
+share/perl/5.10/constant.pm
Math/BigInt/Calc.pm  -> /ha/work/projects/perl_repo/Ubuntu/10.04/i686/
+share/perl/5.10/Math/BigInt/Calc.pm
warnings.pm          -> /usr/share/perl/5.10/warnings.pm
overload.pm          -> /usr/share/perl/5.10/overload.pm
integer.pm           -> /usr/share/perl/5.10/integer.pm
[download]

On the other hand, works well on perl 5.12.1 on openSUSE 11.3.
Update: paths added. I checked everything in the perl_repo, it's latest CPAN version available.