Nintendo has recently admitted that there is a flaw
in the design of the DS Lite. The flaw, which lies in the housing for the unit, can cause cracking above the power connector. While it affected a minor portion of DS Lite owners and doesn't affect the functionality of the unit (in the short term), Nintendo is still making customers aware of the issue and offering replacements to those who have damaged units. Whether or not this lies outside the standard warranty on the unit is unclear, but with a manufacturing defect they don't have much choice but to replace them.