ICANN has released The Domain Name Hijacking Report (pdf). The report was commissioned in response to both
highly publicized hijacking events and a number of lesser publicized
events.

ISANN’s Secxurity Committee found that domain name hijacking incidents are
commonly the result of flaws in registration and related processes,
failure to comply with the transfer policy and poor administration of
domain names.

The report recommends ten key actions including
implementation of improved auditing and compliance measures, and
additional measures to protect registration information from misuse by
would-be hijackers, as well as implementation of emergency procedures
to assist in the urgent restoration of a domain name.