I'm thinking of things like $VERSION and @ISA.
These kind of things are fine, you are only declaring them with our for your own convenience within your module - when they are accessed by perl itself or by another module (in the case of $VERSION and ExtUtils::MakeMaker for instance,) they are accessed as if they were fully qualified.
Infact h2xs does declare them as our by default :
our @ISA = qw(Exporter);
# .. removed the comments
our %EXPORT_TAGS = ( 'all' => [ qw(
) ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw(
);
our $VERSION = '0.01';
/J\