I was looking to https://pharo.fogbugz.com/default.asp?14616 per the other "Package Cleaning" thread and noticed that... PackageTreeNautilusUI(AbstractNautilusUI)>>mcWorkingCopyCreated: ...responds to Monticello /MCWorkingCopyCreated/ announcements to create packages using use RPackageOrganizer, and I wonder if its really a good idea for a UI component to be doing that. What happens if that UI component is replaced? It seems to me that the UI should listen only for announcements from the default RPackageOrganiser, which in turn is the entity that acts on announcements from Monticello. cheers -ben