During updating I faced these issues with the administrative data:
1. After migrating from 2.0.5 to any version with the new UI, all drop-down fields with null data, are showing the first value instead to be empty.
2. After upgrade to 2.5, all drop-down entries are shown empty. If I set them again manually, they are remembered fine. On ver 2.4.1 they show properly (except these on point 1).