sometimes XCSoar crashes (probably a phone's fault) and the saved tracklog is not signed. I understand that it is signing logs at the end but I was sad that I couldn't load my flight log into XContest. What about saving and signing a log into a tmp (.part) file which would be updated/rewritten every 1/2/3/5 minutes and eventually deleted once the original tracklog is properly saved and signed? It would be good to have at least "something" in hand. On the other hand, it wouldn't solve the problem if the crash happens during the tracklog saving.