I have an issue, and I apologize if this has already been discussed. When I attempt to launch a new space plane from the SPH the game "locks up." It doesn't freeze, technically, but it stays in the SPH and all the buttons are grayed out. I can still click on the 4 new buttons added in 0.9 (attach, rotate, blah, blah) but nothing else and have to Alt-F4 to get out of the game. This issue exists whether I'm using stock parts or Interstellar parts, and only exists in the SPH. I can build, save, and launch ships from the VAB using stock or interstellar parts without any issues.