First off, I apologise to those who were hit by the 'serialisation' problems where certain importers were not saving correctly. I screwed up my import folder deduplication code last week; I had a test to make sure the deduplication transformation worked, but the test missed that some importers were not saving correctly afterwards. If you were hit by an import folder, subscription, or downloader page that would not save, this is now completely fixed. Nothing was damaged (it just could not save new work), and you do not have to do anything, so please just unpause anything that was paused and you should return to normal.