Currently, if the player:
1 - Uses the Orb of Zot in a dungeon
2 - Attacks any plant
The inventory panel will begin to flicker and/or behave erratically. I found this in (flaming) Rock Garden playing as a Gnome Thief then reproduced it as a Human Tinker in Southern Swamp. The screenshot below shows one thing that can happen (the "glue item here" graphics for the inventory are missing) but there are other graphical issues which also crop up, most often flickering of various elements of the player panel (status effects, inventory, etc.)