I'm having the same problems here. Any object I create goes haywire, whether I built them in Kerbin or Mun. my rover, as soon as it spawns, it's tires are blown right away, and about a second after it's spawning it either goes spinning into space, or explodes (somehow suddenly moves into the launchpad. The only way to circumvent it is to built in awkward ways with supporting struts as to evade the platform as much as possible. Also, when I return to the space-hangar, my last spawned vehicle is there, but its in the floor (it's main part (that is selected first during creating) is at ground level). I made sure the platform was horizontal. I'm using version 3.5 on KSP 0.22. An example of the error-log is attached. Any idea?