Apple recalls duckhead adapters sold with MacBook laptops and iPads. A design flaw that could potentially lead to electrical shock is the reason for this recall. A lot of Apple products have this duckhead plug so this is a fairly big recall!
Still, only 12 known cases according to Apple exists.
Check the image below, to see if your duckhead is affected. The Redesigned has the EUR marking and is safe to use.
Please note this is only for the plug, the adapter itself is good.
More information: Apple AC Wall Plug Adapter Exchange Program