If I call:
[jimk] 501 $ perldoc Storable
... before the formatted documentation appears, these two warning briefly appear:
/usr/local/lib/perl5/5.8.7/darwin-2level/Storable.pm:710: Unknown escape E<GT>
/usr/local/lib/perl5/5.8.7/darwin-2level/Storable.pm:711: Unknown escape E<GT>
That POD escape character should be all lower-case:
:710,711s/<GT>/<gt>/c
... in vi should do it.