When I click on any button it blanks out, then reappears once I release the mousebutton.
The only button that actually seems to trigger the item is the Hearthstone one -- food, potions, bandages, etc. don't do anything.
You have to be missing health in order for the food to work (unless it's just a buff food...I think).
Mikma...is there any reason why the metro definition isn't local?