Seriously. I copied and pasted something, and all was well until the part i copied mysteriously vanished -after- I saved and quit. Now all I have to go on is a video.
On the other hand, is it feasable to enable an autosave feature that, every so often, the currently active .osu is autosaved (preferably only if the author and user editing the beatmap are equivalent) as filename.osubackup or something?