I just came back to this for the first time since December and tried the new Linux build. A major regression (makes the game basically impossible):
In inventory view, it seems to be auto-middle-clicking. It affects both the bag and the store, so if I go to Vanille’s store and hover over any icons or list items, they very quickly switch places, together with the next thing that moves under the cursor, and the next thing, and the next thing… It also happens in the ordinary inventory view, where it dumps loads of items into the scene.
Everything else seems to be working fine, so it’s odd that it’s just in that one place.