If you ride on a SRAM 10spd chain, as I do, with the PowerLock connector, SRAM has issued a voluntary recall for the connectors;

Though I have ridden on the same SRAM chains for nearly 3 years using the same connector without one single issue, it sounds as though SRAM is being a proactive supplier and issuing the recall. It's a painful decision to make, but I applaud them for doing it.
(I guess it's a good thing I've got a new Ultegra 6700 bike I'm riding...)
Tim