I have several models which all have has_and_belongs_to_many releationships with each other. When the create action is called, the ActiveRecord.Base#save will only save one of these relationships, the rest will be ignored. When the update action is called the ActiveRecord.Base#save will then save all of the relationships. Both actions call the same method to get the values (from the multi-select box) and populate the accociated objects. Before upgrading to 1.0 this worked fine. After upgrading it broke. After rolling back it worked again. Also, it is happening for all the models. My ISP says they have not heard of this from anyone else, and no one on irc has heard of it either? Does anyone have any ideas? Thanks, Steven A Bristol