This is the sheet: This is what it looks like when I try to drag & drop: (fails for all spells and items, including those I was able to add last week. Previously there was an "adding from compendium" message when dragging over, but this no longer appears) ETA: on Firefox. Will try other browsers / disabling add-ons in the morning when I am more compos mentis. ETA 2: think I found an add-on which is causing the conflict, but going to sleep now