Nintendo is offering to replace the original version of the wrist straps for the Wii Remote with a newer version. We have received some reports that when consumers swing the Wii Remote with the original version of the wrist-strap using excessive force and accidentally let go, the cord connecting the controller to the wrist strap can break, potentially causing the Wii Remote to strike bystanders or objects. Because Wii consoles shipped starting in early December already utilized the newer version of the strap, you will need to determine which version of the strap you have before ordering a replacement. To determine if you need the newer version of the strap, or to place an order for a replacement, click here.
News source: Nintendo of America
Link: Order Your Free Strap Replacements (US and Canada)