HaZZoR

Title: Inventory/stacking bug Version: 3.1.2 OS: Win 7 Java Version: 7 Description of Problem: when moving things around my inventory or more frequently stacking them, some wierd things happen, i find it hard to describe so i made a short video http://www.youtube.com/watch?v=y9_7HhUGBHw&feature=youtu.be Error Messages: N/A Error Log: N/A