If i look at the source of Apache::Htpasswd, it looks like this module assumes there is a colon ":" after every password like this:

user1:pwd1:
user2:pwd2:
user3:pwd3:
user4:pwd4:
user5:pwd5:
user6:pwd6:
[download]

After this colon there is a column for "info", whatever that may be. If i were you, i'd mail the owner/author of Apache::Htpasswd (Kevin Meltzer).