A mild rant and a desperate plea for help: I've been playing in career mode for several weeks - not a great or super experienced player but enough to know that staging with the space bar is supposed to work consistently, and I'm getting REALLY tired of it not working mid-game, mid-burn, or at random points in a mission. I've not touched the key bindings for staging; I've ensured that I'm not in warp when I try to stage; there's no purple light in the lower left corner; I've ensured I've not pressed Alt-L, and even when staging fails and I try pressing Alt-L it doesn't start working. I've rebooted and started a mission fresh from the VAB, gotten into orbit no problem, set up my maneuver node, warped to the node, stopped the warp well in advance of the node, started my burn, and when it's time to stage mid-way ... nothing. I have to manually decouple, then manually activate the engine. Of course, if I'm planning to decouple during a landing or re-entry sequence, it's even more disruptive. Restarting the game from scratch, or rebooting SOMETIMES resolves it temporarily, but I shouldn't have to reboot in the middle of a game just to get staging to work. Is this just an on-going bug - I've seen it in both 1.9 and 1.10, and seen it on numerous threads elsewhere as I've tried to find a solution. What the HECK is going on? What have I missed? What else can I try to fix this?