for fatal crashes that would require a data format for the replays that doesn't need to be cleanly finalized at the end of the program, which would make sense anyhow for games in the release version. Since alpha is on official servers only, the replays should exist and be easily accessible. for other bug reports a simple way of getting a unique location might be useful, so that with a time index and the location one can easily refer to some point of interest (bugs and otherwise).
Well what about used entered timed notification within the chrono-cam log? Even adding the note on the fly while playing the game - like a text box on location on the planet.