Late in the code sprint the last day of DrupalCON in Copenhagen, there was a lot of discussion going on about the upgrade path in Drupal 7.  Questions of how to handle certain aspects of the process and prevent horrible flaming death when upgrading a site and it's contrib modules.  Upgrade processes, much like data migration, often become a sticky problem.   Right now that stickiness has literally stuck the release of Drupal 7.

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