I'm not sure if there's anything I can do to save my game, but I seem to have awoken the kraken, although the wiki says this is a fixed problem.
I'm playing in a career mode and it seems any aircraft I build will randomly start to fall apart shortly after takeoff. I use Kerbal Construction Time and the simulated flight flies fine, but as soon as I try to fly a built plane pieces just start falling off it. I know it's not the plane design because at the same time I see explosions happening on the Launchpad where nothing is sitting, and which is about a kilometre from my take off point.
I have previously flown propeller aircraft in the current career and they were unaffected. I suppose I could do a backup and start experimenting with workarounds using different plane designs to see if it makes any difference, though its tedious with KCT installed. I'm kind of hoping this a known issue that has a fix hiding somewhere.
Any advice appreciated!
{UPDATE} Ok, it seems if I load the game and fly the plane all is well. It seems only to explode if I pilot another vehicle first.