Just thought of this earlier. It's not really a "bug" but more of a problem that should be fixed.
When you click on an item in the floor, the item is then "located" on as your clicked on item. It doesn't exist on the floor anymore. Same thing happens when you click on an item in your bag. When you've got your bag item selected, the item is no longer in your bag and only exists as the click on the item.
The reason this is a problem is when you PvP and you want to change gear. Say I have a sword+shield equipped. I want to change it to fencing. When I click on the fencing weapon, it doesn't get equipped because sword + shield is 2 items. The fencing sword tries to go into the right hand weapon slot but then it detects that the shield is still on and taking up the left hand weapon slot. So you can't change between sword+shield to 2hander just by clicking. You need to drop and drop.
What happens when you have the item selected and you're in the process of dragging the fencing weapon to equip it but you get killed? As long as you hold the mouse button down, the item will remain as your clicked on item but it won't exist in your bag anymore. If you let go (even as dead) you will drop the item. But since you are dead, you can't open your inventory so you can't put the item back in your bag. So either you lose the item or hold down the mouse button until a priest resses you.


