Yup, also guilty of this one. I caught myself doing this last night with one of Scott Manley's videos. Then again, I was also rather tired at the time. Plus, I've been having KSP withdrawals. Game just keeps crashing in load lately, and I haven't worked out which mod is causing it. Oddly, I had my full mod list loading just fine a few days ago, and running without any problems. I've just backed up my saves, deleted the game, and am going to start fresh, see if I can fix it that way. I think I may have incorrectly installed a mod at some point, and overwrote something I may not want to have.