To update the topic, as well: I could reproduce this from the save. Any resave from that save could be loaded fine, but after loading one of those saves and re-saving again, it would crash on load. Copying the data.000 from the original save to the second resave would allow it to be loaded (still with the same issue as the original save). There were too many changes in the file to make tracking down the problem feasible; some trial and error replacing data sections may have narrowed it down, but a fix from that point would not necessarily have been obvious, and xwm had already restarted.