Nikon has announced a voluntary recall for some EN-EL3 batteries for the D50, D70 and D100. For full information visit:

http://www.nikonusa.com/email_images/nikon...ry/battery.html

From Nikon's site:

Nikon Inc. is asking your cooperation in connection with a voluntary recall of certain lot numbers of its Nikon Model EN-EL3 rechargeable lithium ion battery packs. The battery pack can experience a short circuit causing it to overheat and possibly melt, posing a potential hazard to consumers. There have only been four confirmed reports of incidents of the problem worldwide, and while no injuries have taken place, Nikon Inc. has initiated this recall of the affected lot numbers as a reflection of its commitment to safety and product quality. We are asking that owners of the affected battery packs return them to Nikon Inc. for a free replacement.