Killed Val with the same issue last night: pod with service bay and Science Jr flipped ends and exploded. I'm wondering whether it's a bug or realism though; I haven't had the issue with capsules by themselves, and I don't recall any real life space programs that had long skinny top heavy re-entry vehicles... Vostok, Soyuz, Mercury, Gemini and Apollo all had short squat capsules. I'm wondering whether it's a bug or just bad (ie unrealistic) design and re-entry trajectories combined with false expectations created by the old aero system...