"In the case where you place a keyframe wrongly, you can save the replay. Go to your replays folder, open up the replay with notepad and remove the last line, then go back into the replay and continue as if the misplaced keyframe never happened."

I learnt something :o

Do you think it could be worth to suggest a new command to erase the last keyframe in order ?

I have a tip about keyframing : When the tori you are following with the camera go out of it (=killing english), reset the replay, pause it when the tori is out of the screen, press 2 to get the freecam, just move the point of view with the mouse right click, add a keyframe.