InventoryClickEvent: Mc1.5 Tweaks

Hello,

I seem to have a pretty big problem with the InventoryClickEvent and Minecraft 1.5
Hovering over a slot for example in a chest and pressing a number from 1-9 on your keyboard moves items from your hotbar to the slot.

But using event.getCurrentItem() or event.getCursor() always returns AIR?

Maybe someone can help me, because this allows players to circumvent all restrictions related to inventories.

Using: Craftbukkit #2762