What was the actual 'perl Makefile.PL' command that you ran ?

I'm facing this issue with perl 5.10, same is fine with perl 5.8

Then it's most likely something that ExtUtils::MakeMaker is doing on perl-5.10, but not on perl-5.8. I'm loathe to suggest that you downgrade EU::MM, but maybe *upgrading* EU::MM on the 5.10 installation might also fix the problem (if that's an option).

Cheers,
Rob