I use Zotero standalone (I always update). I'm having a lot of difficulty moving items from one collection to another (using drag-and-drop). Sometimes it's fine, in fact I don't think I've ever had trouble moving an item from the Unfiled folder into a collection. But when I try to copy/move an item between collections, often the item simply doesn't copy over. Also, sometimes in the process of trying to move it, a collection (or several!) will inexplicably move inside another collection , and pulling it back out is as difficult as getting a single item to move. As a result I've often spent a good ten minutes to copy a single item into the correct folder and fix the damage to the collection structure. I wish one could simply right-click an item and select the collection from there!

I want to mention that this is also an ergonomic issue. Holding the mouse button and moving the mouse around puts considerable strain on the arm nerves, exacerbating a problem I already have. My arm actually hurts from all of this.

Thanks!