Suppose one observer is midway inside a speeding train and another observer standing on a platform as the train moves past. A flash of light is given off at the center of the train just as the two observers pass each other $t_0$.
Additionally, there are two clocks, one in the front end of the train, and one in the back end. Both observers agree that the clocks are synchronous at $t_0$ (is this assumption the source of the problem?). The clocks are programmed to freeze immediately once they receive the light from the flash. Will the observers disagree on the time the frozen clocks are showing?