A teacher trainer created three sample Glossary activities and created multiple entries in all three - of different types. One links, one images and one text. Much later the teacher found the Glossary emtpy. This after a few version upgrades. The main Glossary activity and description are intact and all the files remain in the Course files, but the Glossary items themselves are gone. I can't think of how some upgrading mistake (now at 1.9.10) or misplaced uploaddata directory or accidental course reset could be the cause. Any suggested sources. It is no critical as the information was for sample purposes only.