SealMan87

I just tried the save file fix to no avail. In fact, I was able to do even less that I could before when I loaded my save file. I could only access the technology building, and could not quit the game through the menu (I had to alt+F4 to exit). Guess I'll just start a new game and see if it happens again, fortunately I hadn't progressed too far.

You may be on to something with the test parts, as when my game broke I was using some. I made the fix to my save file, and once my video driver finishes updating I'm going to give it a shot.

I just got this issue as well. I was unable to do anything in build mode, the different part groups menu disappeared and I was in display all parts mode and couldn't get out of it. I tried to launch the rocket I was building and the game basically froze and wouldn't do anything, but the Kerbals were still walking around in the background of the build mode. Before it froze completely, I backed out to view the whole space complex, and noticed that time was not progressing, nor could I get time to progress by accelerating it. It seems like it's a problem with a particular ship I was building, as I was able to load a different save and load a default ship and was able to modify it after a couple of tries. (A few other saves I loaded didn't fix the problem, even one from yesterday). Once I loaded that ship I was building, the game messed up again with all the issues above. I've attached my save as well, if you need to take a look at it: http://www.filedropper.com/quicksave2