Mark shuttleworth has proposed a six week delay in the release date of Dapper Drake in order to do additional validation, certification, localisation, and polish.
Read the question here
However, in some senses Dapper is a “first” for us, in that it is the
first “enterprise quality” release of Ubuntu, for which we plan to offer
support for a very long time. I, and others, would very much like Dapper
to stand proud amongst the traditional enterprise linux releases from
Red Hat, Debian and SUSE as an equal match on quality, support and
presentation. We would like Ubuntu Dapper to be a release that companies
can deploy with confidence, which will be the focus of certification
work from ISV's and IHV's, and which will bring the benefits of Debian
to a whole new group of users.