No help from me, but I am having the exact same problem . Nothing works ( 5 "North America" "NA" "US" ... ) . Something must have broken recently . I remember using CPAN a couple of years ago and it worked ( tedious , but it worked ) .
Would someone fix this or suggest another way to install DBD::Oracle ?
root@server ~# cpan -v
cpan script version 1.03
CPAN.pm version 1.7602
root@server ~#
-- Mo