I'm having an issue since I updated to 1.3.3 (from your 2013.12.18.21.39 pre-release build) It's now impossible for me to switch to a different vessel without the game not knowing where it is. I have to restart the game every time. Twice even the space center wasn't loading and I could only see the atmosphere. Though I'm using several mods, there's a bunch of RT2-related exceptions in the log, as well as evidence of active ship being in a broken state during save (eeek!) https://www.dropbox.com/s/77ul6thcj9jwtvm/output_log.txt Other mods: Deadly re-entry, Kethane, Alarm clock, TAC life support, Kerbal Engineer, KW Rocketry, KAS, FAR, Interstellar, MagicSmokeIndustries, Enhanced Navball